diff --git a/crazy_functions/rag_fns/arxiv_fns/essay_structure.py b/crazy_functions/rag_fns/arxiv_fns/essay_structure.py
new file mode 100644
index 00000000..91ea0474
--- /dev/null
+++ b/crazy_functions/rag_fns/arxiv_fns/essay_structure.py
@@ -0,0 +1,356 @@
+"""
+LaTeX Document Parser
+
+This module provides functionality for parsing and extracting structured information from LaTeX documents,
+including metadata, document structure, and content. It uses modular design and clean architecture principles.
+"""
+
+
+import re
+from abc import ABC, abstractmethod
+from enum import Enum
+import logging
+
+# Configure logging
+logging.basicConfig(level=logging.INFO)
+logger = logging.getLogger(__name__)
+
+from dataclasses import dataclass, field
+from typing import List, Optional, Dict
+from enum import Enum
+import logging
+from copy import deepcopy
+from crazy_functions.rag_fns.arxiv_fns.latex_cleaner import clean_latex_commands
+
+logger = logging.getLogger(__name__)
+
+
+class SectionLevel(Enum):
+    CHAPTER = 0
+    SECTION = 1
+    SUBSECTION = 2
+    SUBSUBSECTION = 3
+    PARAGRAPH = 4
+    SUBPARAGRAPH = 5
+
+
+@dataclass
+class Section:
+    level: SectionLevel
+    title: str
+    content: str = ''
+    subsections: List['Section'] = field(default_factory=list)
+
+    def merge(self, other: 'Section') -> 'Section':
+        """Merge this section with another section."""
+        if self.title != other.title or self.level != other.level:
+            raise ValueError("Can only merge sections with same title and level")
+
+        merged = deepcopy(self)
+        merged.content = self._merge_content(self.content, other.content)
+
+        # Create subsections lookup for efficient merging
+        subsections_map = {s.title: s for s in merged.subsections}
+
+        for other_subsection in other.subsections:
+            if other_subsection.title in subsections_map:
+                # Merge existing subsection
+                idx = next(i for i, s in enumerate(merged.subsections)
+                           if s.title == other_subsection.title)
+                merged.subsections[idx] = merged.subsections[idx].merge(other_subsection)
+            else:
+                # Add new subsection
+                merged.subsections.append(deepcopy(other_subsection))
+
+        return merged
+
+    @staticmethod
+    def _merge_content(content1: str, content2: str) -> str:
+        """Merge content strings intelligently."""
+        if not content1:
+            return content2
+        if not content2:
+            return content1
+        # Combine non-empty contents with a separator
+        return f"{content1}\n\n{content2}"
+
+
+@dataclass
+class DocumentStructure:
+    title: str = ''
+    abstract: str = ''
+    toc: List[Section] = field(default_factory=list)
+    metadata: Dict[str, str] = field(default_factory=dict)
+
+    def merge(self, other: 'DocumentStructure', strategy: str = 'smart') -> 'DocumentStructure':
+        """
+        Merge this document structure with another one.
+
+        Args:
+            other: Another DocumentStructure to merge with
+            strategy: Merge strategy - 'smart' (default) or 'append'
+                     'smart' - Intelligently merge sections with same titles
+                     'append' - Simply append sections from other document
+        """
+        merged = deepcopy(self)
+
+        # Merge title if needed
+        if not merged.title and other.title:
+            merged.title = other.title
+
+        # Merge abstract
+        merged.abstract = self._merge_abstract(merged.abstract, other.abstract)
+
+        # Merge metadata
+        merged.metadata.update(other.metadata)
+
+        if strategy == 'append':
+            merged.toc.extend(deepcopy(other.toc))
+        else:  # smart merge
+            # Create sections lookup for efficient merging
+            sections_map = {s.title: s for s in merged.toc}
+
+            for other_section in other.toc:
+                if other_section.title in sections_map:
+                    # Merge existing section
+                    idx = next(i for i, s in enumerate(merged.toc)
+                               if s.title == other_section.title)
+                    merged.toc[idx] = merged.toc[idx].merge(other_section)
+                else:
+                    # Add new section
+                    merged.toc.append(deepcopy(other_section))
+
+        return merged
+
+    @staticmethod
+    def _merge_abstract(abstract1: str, abstract2: str) -> str:
+        """Merge abstracts intelligently."""
+        if not abstract1:
+            return abstract2
+        if not abstract2:
+            return abstract1
+        # Combine non-empty abstracts with a separator
+        return f"{abstract1}\n\n{abstract2}"
+
+
+
+
+
+
+class BaseExtractor(ABC):
+    """Base class for LaTeX content extractors."""
+
+    @abstractmethod
+    def extract(self, content: str) -> str:
+        """Extract specific content from LaTeX document."""
+        pass
+
+
+class TitleExtractor(BaseExtractor):
+    """Extracts title from LaTeX document."""
+
+    PATTERNS = [
+        r'\\title{(.+?)}',
+        r'\\title\[.*?\]{(.+?)}',
+        r'\\Title{(.+?)}',
+        r'\\TITLE{(.+?)}',
+        r'\\begin{document}\s*\\section[*]?{(.+?)}',
+        r'\\maketitle\s*\\section[*]?{(.+?)}',
+        r'\\chapter[*]?{(.+?)}'
+    ]
+
+    def extract(self, content: str) -> str:
+        """Extract title using defined patterns."""
+        for pattern in self.PATTERNS:
+            matches = list(re.finditer(pattern, content, re.IGNORECASE | re.DOTALL))
+            for match in matches:
+                title = match.group(1).strip()
+                if title:
+                    return clean_latex_commands(title)
+        return ''
+
+
+class AbstractExtractor(BaseExtractor):
+    """Extracts abstract from LaTeX document."""
+
+    PATTERNS = [
+        r'\\begin{abstract}(.*?)\\end{abstract}',
+        r'\\abstract{(.*?)}',
+        r'\\ABSTRACT{(.*?)}',
+        r'\\Abstract{(.*?)}',
+        r'\\begin{Abstract}(.*?)\\end{Abstract}',
+        r'\\section[*]?{(?:Abstract|ABSTRACT)}\s*(.*?)(?:\\section|\Z)',
+        r'\\chapter[*]?{(?:Abstract|ABSTRACT)}\s*(.*?)(?:\\chapter|\Z)'
+    ]
+
+    def extract(self, content: str) -> str:
+        """Extract abstract using defined patterns."""
+        for pattern in self.PATTERNS:
+            matches = list(re.finditer(pattern, content, re.IGNORECASE | re.DOTALL))
+            for match in matches:
+                abstract = match.group(1).strip()
+                if abstract:
+                    return clean_latex_commands(abstract)
+        return ''
+
+
+class SectionExtractor:
+    """Extracts document structure including sections and their content."""
+
+    def __init__(self):
+        self.section_pattern = self._compile_section_pattern()
+
+    def _compile_section_pattern(self) -> str:
+        """Create pattern for matching section commands."""
+        section_types = '|'.join(level.name.lower() for level in SectionLevel)
+        return fr'\\({section_types})\*?(?:\[.*?\])?\{{(.*?)\}}'
+
+    def extract(self, content: str) -> List[Section]:
+        """Extract sections and build document hierarchy."""
+        sections = []
+        section_stack = []
+        matches = list(re.finditer(self.section_pattern, content, re.IGNORECASE))
+
+        for i, match in enumerate(matches):
+            cmd_type = match.group(1).lower()
+            section_title = match.group(2)
+            level = SectionLevel[cmd_type.upper()]
+
+            content = self._extract_section_content(content, match,
+                                                    matches[i + 1] if i < len(matches) - 1 else None)
+
+            new_section = Section(
+                level=level,
+                title=clean_latex_commands(section_title),
+                content=clean_latex_commands(content)
+            )
+
+            self._update_section_hierarchy(sections, section_stack, new_section)
+
+        return sections
+
+    def _extract_section_content(self, content: str, current_match: re.Match,
+                                 next_match: Optional[re.Match]) -> str:
+        """Extract content between current section and next section."""
+        start_pos = current_match.end()
+        end_pos = next_match.start() if next_match else len(content)
+        return content[start_pos:end_pos].strip()
+
+    def _update_section_hierarchy(self, sections: List[Section],
+                                  stack: List[Section], new_section: Section):
+        """Update section hierarchy based on section levels."""
+        while stack and stack[-1].level.value >= new_section.level.value:
+            stack.pop()
+
+        if stack:
+            stack[-1].subsections.append(new_section)
+        else:
+            sections.append(new_section)
+
+        stack.append(new_section)
+
+
+class EssayStructureParser:
+    """Main class for parsing LaTeX documents."""
+
+    def __init__(self):
+        self.title_extractor = TitleExtractor()
+        self.abstract_extractor = AbstractExtractor()
+        self.section_extractor = SectionExtractor()
+
+    def parse(self, content: str) -> DocumentStructure:
+        """Parse LaTeX document and extract structured information."""
+        try:
+            content = self._preprocess_content(content)
+
+            return DocumentStructure(
+                title=self.title_extractor.extract(content),
+                abstract=self.abstract_extractor.extract(content),
+                toc=self.section_extractor.extract(content)
+            )
+        except Exception as e:
+            logger.error(f"Error parsing LaTeX document: {str(e)}")
+            raise
+
+    def _preprocess_content(self, content: str) -> str:
+        """Preprocess LaTeX content for parsing."""
+        # Remove comments
+        content = re.sub(r'(?<!\\)%.*$', '', content, flags=re.MULTILINE)
+
+        # # Handle input/include commands
+        # content = re.sub(r'\\(?:input|include){.*?}', '', content)
+        #
+        # # Normalize newlines and whitespace
+        # content = re.sub(r'\r\n?', '\n', content)
+        # content = re.sub(r'\n\s*\n', '\n', content)
+
+        return content
+
+
+def pretty_print_structure(doc: DocumentStructure, max_content_length: int = 100):
+    """Print document structure in a readable format."""
+    print(f"Title: {doc.title}\n")
+    print(f"Abstract: {doc.abstract}\n")
+    print("Table of Contents:")
+
+    def print_section(section: Section, indent: int = 0):
+        print("  " * indent + f"- {section.title}")
+        if section.content:
+            preview = section.content[:max_content_length]
+            if len(section.content) > max_content_length:
+                preview += "..."
+            print("  " * (indent + 1) + f"Content: {preview}")
+        for subsection in section.subsections:
+            print_section(subsection, indent + 1)
+
+    for section in doc.toc:
+        print_section(section)
+
+
+# Example usage:
+if __name__ == "__main__":
+    # Sample main.tex
+    main_tex = r"""
+    \documentclass{article}
+    \title{Research Paper}
+    \begin{document}
+    \begin{abstract}
+    Main abstract introducing the research.
+    \end{abstract}
+    \section{Introduction}
+    Overview of the topic...
+    \section{Background}
+    Part 1 of background...
+    \end{document}
+    """
+
+    # Sample background.tex
+    background_tex = r"""
+    \section{Background}
+    Part 2 of background...
+    \subsection{Related Work}
+    Discussion of related work...
+    \section{Methodology}
+    Research methods...
+    """
+
+    # Parse both files
+    parser = EssayStructureParser()  # Assuming LaTeXParser class from previous code
+    main_doc = parser.parse(main_tex)
+    background_doc = parser.parse(background_tex)
+
+    # Merge documents using smart strategy
+    merged_doc = main_doc.merge(background_doc)
+
+    # Example of how sections are merged:
+    print("Original Background section content:",
+          [s for s in main_doc.toc if s.title == "Background"][0].content)
+    print("\nMerged Background section content:",
+          [s for s in merged_doc.toc if s.title == "Background"][0].content)
+    print("\nMerged structure:")
+    pretty_print_structure(merged_doc)  # Assuming pretty_print_structure from previous code
+
+    # Example of appending sections
+    appended_doc = main_doc.merge(background_doc, strategy='append')
+    print("\nAppended structure (may have duplicate sections):")
+    pretty_print_structure(appended_doc)
\ No newline at end of file
diff --git a/crazy_functions/rag_fns/arxiv_fns/latex_cleaner.py b/crazy_functions/rag_fns/arxiv_fns/latex_cleaner.py
new file mode 100644
index 00000000..6f2ea06c
--- /dev/null
+++ b/crazy_functions/rag_fns/arxiv_fns/latex_cleaner.py
@@ -0,0 +1,220 @@
+from dataclasses import dataclass, field
+from typing import Set, Dict, Pattern, Optional
+import re
+from enum import Enum
+import logging
+from functools import lru_cache
+
+
+class EnvType(Enum):
+    """Environment classification types."""
+    PRESERVE = "preserve"
+    REMOVE = "remove"
+    EXTRACT = "extract"
+
+
+@dataclass
+class LatexConfig:
+    """Configuration for LaTeX processing."""
+    preserve_envs: Set[str] = field(default_factory=lambda: {
+        # Math environments
+        'equation', 'equation*', 'align', 'align*', 'displaymath',
+        'math', 'eqnarray', 'gather', 'gather*', 'multline', 'multline*',
+        # Tables and figures
+        'table', 'table*', 'tabular', 'tabularx', 'array', 'matrix',
+        'figure', 'figure*', 'subfigure',
+        # Algorithms and code
+        'algorithm', 'algorithmic', 'lstlisting',
+        # Theorems and proofs
+        'theorem', 'proof', 'definition', 'lemma', 'corollary',
+        'proposition', 'example', 'remark'
+    })
+
+    preserve_commands: Set[str] = field(default_factory=lambda: {
+        # Citations and references
+        'caption', 'label', 'ref', 'cite', 'citep', 'citet', 'eqref',
+        # Text formatting
+        'emph', 'textbf', 'textit', 'underline', 'texttt', 'footnote',
+        'section', 'subsection', 'subsubsection', 'paragraph',
+        # Math operators
+        'frac', 'sum', 'int', 'prod', 'lim', 'sup', 'inf'
+    })
+
+    remove_commands: Set[str] = field(default_factory=lambda: {
+        # Document setup
+        'documentclass', 'usepackage', 'input', 'include', 'includeonly',
+        'bibliography', 'bibliographystyle', 'frontmatter', 'mainmatter',
+        # Layout and spacing
+        'pagestyle', 'thispagestyle', 'vspace', 'hspace', 'vfill', 'hfill',
+        'newpage', 'clearpage', 'pagebreak', 'linebreak', 'newline',
+        'setlength', 'setcounter', 'addtocounter', 'renewcommand',
+        'newcommand', 'makeatletter', 'makeatother', 'pagenumbering',
+        # Margins and columns
+        'marginpar', 'marginparsep', 'columnsep', 'columnseprule',
+        'twocolumn', 'onecolumn', 'minipage', 'parbox'
+    })
+
+    latex_chars: Dict[str, str] = field(default_factory=lambda: {
+        '~': ' ', '\\&': '&', '\\%': '%', '\\_': '_', '\\$': '$',
+        '\\#': '#', '\\{': '{', '\\}': '}', '``': '"', "''": '"',
+        '\\textbackslash': '\\', '\\ldots': '...', '\\dots': '...',
+        '\\textasciitilde': '~', '\\textasciicircum': '^',
+        '\\quad': ' ', '\\qquad': ' ', '\\,': '', '\\;': '', '\\:': '',
+        '\\!': '', '\\space': ' ', '\\noindent': ''
+    })
+
+    inline_math_delimiters: Set[str] = field(default_factory=lambda: {
+        '$', '\\(', '\\)', '\\[', '\\]'
+    })
+
+
+class LatexCleaner:
+    """Efficient and modular LaTeX text cleaner."""
+
+    def __init__(self, config: Optional[LatexConfig] = None):
+        self.config = config or LatexConfig()
+        self.logger = logging.getLogger(__name__)
+
+    @lru_cache(maxsize=128)
+    def _get_env_pattern(self, env_name: str) -> Pattern:
+        return re.compile(fr'\\begin{{{env_name}}}(.*?)\\end{{{env_name}}}', re.DOTALL)
+
+    def _get_env_type(self, env_name: str) -> EnvType:
+        """Determine environment processing type."""
+        if env_name.rstrip('*') in {name.rstrip('*') for name in self.config.preserve_envs}:
+            return EnvType.PRESERVE
+        elif env_name in {'verbatim', 'comment'}:
+            return EnvType.REMOVE
+        return EnvType.EXTRACT
+
+    def _process_environment(self, match: re.Match) -> str:
+        try:
+            env_name = match.group(1)
+            content = match.group(2)
+            env_type = self._get_env_type(env_name)
+
+            if env_type == EnvType.PRESERVE:
+                # Preserve math content without markers for inline math
+                if env_name in {'math', 'displaymath'}:
+                    return f" {content} "
+                return f" [BEGIN_{env_name}] {content} [END_{env_name}] "
+            elif env_type == EnvType.REMOVE:
+                return ' '
+            # Process nested environments recursively
+            return self._clean_nested_environments(content)
+        except Exception as e:
+            self.logger.error(f"Error processing environment {env_name}: {e}")
+            return content
+
+    def _clean_nested_environments(self, text: str) -> str:
+        """Process nested environments recursively."""
+        return re.sub(
+            r'\\begin{(\w+)}(.*?)\\end{\1}',
+            self._process_environment,
+            text,
+            flags=re.DOTALL
+        )
+
+    def _clean_commands(self, text: str) -> str:
+        """Clean LaTeX commands while preserving specified content."""
+        # Remove complete commands
+        for cmd in self.config.remove_commands:
+            text = re.sub(fr'\\{cmd}\*?(?:\[.*?\])?(?:{{.*?}})*', '', text)
+
+        # Process commands with content
+        def handle_command(match: re.Match) -> str:
+            cmd = match.group(1).rstrip('*')  # Handle starred versions
+            content = match.group(2)
+
+            # Keep math content intact
+            if cmd in {'[', ']', '(', ')', '$'} or cmd in self.config.inline_math_delimiters:
+                return content
+
+            return content if cmd in self.config.preserve_commands else ' '
+
+        # Handle commands with arguments
+        text = re.sub(r'\\(\w+)\*?(?:\[.*?\])?{(.*?)}', handle_command, text)
+
+        # Handle inline math
+        text = self._preserve_inline_math(text)
+
+        # Remove remaining standalone commands
+        return re.sub(r'\\[a-zA-Z]+\*?(?:\[\])?', '', text)
+
+    def _preserve_inline_math(self, text: str) -> str:
+        """Preserve inline math content."""
+        # Handle $...$ math
+        text = re.sub(r'\$(.+?)\$', r' \1 ', text)
+        # Handle \(...\) math
+        text = re.sub(r'\\[\(\[](.+?)\\[\)\]]', r' \1 ', text)
+        return text
+
+    def _normalize_text(self, text: str) -> str:
+        """Normalize special characters and whitespace."""
+        # Replace special characters
+        for char, replacement in self.config.latex_chars.items():
+            text = text.replace(char, replacement)
+
+        # Clean up whitespace
+        text = re.sub(r'\s+', ' ', text)
+        text = re.sub(r'\s*\[BEGIN_(\w+)\]\s*', r' [BEGIN_\1] ', text)
+        text = re.sub(r'\s*\[END_(\w+)\]\s*', r' [END_\1] ', text)
+
+        # Remove empty brackets and braces
+        text = re.sub(r'{\s*}|\[\s*\]|\(\s*\)', '', text)
+
+        return text.strip()
+
+    def clean_text(self, text: str) -> str:
+        """Clean LaTeX text while preserving meaningful content."""
+        if not text:
+            raise ValueError("Input text cannot be empty")
+
+        try:
+            # Remove comments not inside environments
+            text = re.sub(r'(?<!\\)%.*?(?=\n|$)', '', text, flags=re.MULTILINE)
+
+            # Process environments and their nested contents
+            text = self._clean_nested_environments(text)
+
+            # Clean commands and normalize
+            text = self._clean_commands(text)
+            text = self._normalize_text(text)
+
+            return text
+
+        except Exception as e:
+            self.logger.error(f"Error cleaning text: {e}")
+            raise
+
+
+def clean_latex_commands(text: str) -> str:
+    """Convenience function for quick text cleaning with default config."""
+    config = LatexConfig(
+        preserve_envs={'equation', 'theorem'},
+        preserve_commands={'textbf', 'emph', "label"},
+        latex_chars={'~': ' ', '\\&': '&'}
+    )
+    return LatexCleaner(config).clean_text(text)
+
+
+# Example usage:
+if __name__ == "__main__":
+    # Basic usage with inline math
+    text = clean_latex_commands(r"""
+    \textbf{Important} result: $E=mc^2$ and
+    \begin{equation}
+    F = ma
+    \end{equation}
+    """)
+    print(text)
+
+    # Custom configuration
+    config = LatexConfig(
+        preserve_envs={'equation', 'theorem'},
+        preserve_commands={'textbf', 'emph'},
+        latex_chars={'~': ' ', '\\&': '&'}
+    )
+    cleaner = LatexCleaner(config)
+    text = cleaner.clean_text(r"\textbf{Custom} cleaning")
+    print(text)
\ No newline at end of file