I've been searching for a repository or a database with math problems (K-12 levels) written in
LaTeX, but with no luck. Neither in Spanish (my student's language) nor in English. But I bet this is something someone must have done before.
There are things like mathmaster.org where you can download pdf worksheets. Indeed,
LaTex as a backend, but users can just download the final pdf (apart from this technical detail, mathmaster is a great resource).
Anyone knows about such LaTeX repository? Does it exist?
And if there is no LaTeX... Is there any open source repo of any kind?