When using the MediaWiki MathJax extension, it's trivial to create new commands with \newcommand. From the MathJax documentation: You can use the \def, \newcommand, \renewcommand, ...
I noticed that Google Docs now allows putting equations in documents. Is there any way to view/edit the Latex source for these equations?
There're some informations about how to embed the outcome of latex markup in a wiki page in a wikispaces.com project, but I'm missing a statement on the limitation of this markup. I'd like to know: ...