recent favorite web #discovery: https://math.meta.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference

It's a nice cheat sheet on a lot of #LaTeX / #MathJax #markup for creating #mathematical notation.

I get a strange pleasure from typing in the somewhat arcane markup to create beautiful mathematic formulas.

(I mainly use this when taking notes in #Obisidan)