The most reliable way to convert LaTeX to Word is Pandoc: run pandoc paper.tex -o paper.docx --citeproc --bibliography=refs.bib. Equations become editable Word equations, images are embedded and citations are formatted. Add --reference-doc=template.docx to apply your Word styles. For a single formula, paste it into Word's equation editor in LaTeX mode.
Google Docs can't open .tex files, but you can get LaTeX into a Doc two ways. For a whole document, convert it with Pandoc (pandoc paper.tex -o paper.docx) and open the .docx in Google Docs. For individual formulas, use the built-in equation editor, or an add-on such as Auto-LaTeX Equations to render LaTeX code.
Google Docs has no LaTeX export, so convert in two steps. Choose File > Download > Microsoft Word (.docx) or Markdown (.md), then run Pandoc: pandoc mydoc.docx -s -o mydoc.tex --extract-media=. The .docx route keeps headings, lists, tables, images and equations. Finally, open the .tex file in Overleaf and tidy the formatting.
To merge Markdown files and convert them to PDF, run pandoc 01.md 02.md -o merged.pdf, or upload the .md files to Google Drive and merge them with Merge Docs Pro with Save merged Docs as PDF ticked. Google Docs can also open and export single Markdown files, and a free online merger joins .md files.
