On meta.tex.sx, I've asked a question about a class of questions that might get asked over there (and have been) that are (i) ostensibly about maths usage, but (ii) might best be served by an answer that is primarily about how to handle the notation in Latex (See https://tex.meta.stackexchange.com/questions/3523/where-usage-meets-tex ).
One of the moderators, Martin Scharrer, suggests that the best course of action for these is to migrate them here: this is the right place for the usage part, and there are many knowledgeable Texnicians over here who might be able to spot and handle the need for Latex-specific content in the answers.
Would this policy be acceptable here?