LaTeX is a markup language (as is MediaWiki!) for producing mathematical texts of the highest quality. Its use is widespread in the mathematics world. It is built on plain TeX developed by Donald Knuth. You can embed LaTeX markups in mediawiki by the <math></math> tags.
Learning resources on Wikiversity 
- Hello world! on MediaWiki: - There you go:
- LaTeX - introduction
- LaTeX/Inserting diagrams
- LaTeX/Questions and answers - discuss your problems here!
- more... (see also: special:prefixindex/LaTeX)
Creating a new resource 
You are welcome to create a new learning resource for LaTeX! Complete, ready-to-compile sample scripts are very useful.
Learning resources in Wikimedia 
- b:LaTeX - featured book on Wikibooks