type(setting) complex mathematical formulae
TeX is a markup language used to type documents containing mathematical formulas and theorems (and explanations of course): just enter manuscript text intertwined with special commands (reserved words) in a plain text, then run TeX to produce formatted output. TeX works like HTML: so we can define it as a markup language. TeX is a language which transform plain text in a well-formatted textused to typeset documents, especially ones containing mathematics. It has both programming and mark-up features. In this book we willTeX is for typesetting, but how does it work? … Then you send that file through another program (not an editor, but a “compiler” or “interpreter”), and it generates …
Beginners’ Introduction to TeX and its UseThis page is intended only to give a very brief overview of Latex,Introduction to TeX
https://math.vanderbilt.edu/schectex/wincd/intro_to_tex.htm
https://en.wikipedia.org/wiki/List_of_mathematical_symbols_by_subject