These tools can translate your handwritten equation to LaTex:
An introductory LaTeX course in Spanish is now available thanks to Overleaf Advisor, Fausto Mauricio Lagos Suárez. The course includes a series of instructional videos, sample files, and links to documentation in both Spanish & English.
Refer to this multilingual example document with Arabic, Sanskrit, Hindi, Chinese, Japanese, Korean, Greek and Thai.
TeX articles from the Overleaf Blog
A New Series of Articles: TeX Tokens and Related Concepts—But Why (and How)?
Boxes and Glue: A Brief, but Visual, Introduction Using LuaTeX
Using LuaTeX to run tools and utilities installed on Overleaf’s servers
Taming LaTeX’s Page Layout: A Visual Template and Toolset for Book Authors
History of TeX
What's in a Name: A Guide to the Many Flavours of TeX
Autocomplete in LaTeX
Free online LaTeX course by John Lees-Miller, co-founder of Overleaf.
Part 1: The Basics
Part 2: Structured Documents & More
Part 3: Not Just Papers: Presentations & More
TeX Stack Exchange
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A huge range of OpenType fonts are available on the Overleaf platform for use with modern TeX engines (XeTeX and LuaTeX).