# Using the Begingroup Extension of MathJax?

I noticed that the site does not seem to use the begingroup extension for MathJax, which could possibly lead to bugs: For example, a macro defined in a comment to a question could have an unexpected affect on an answer below it.

• This has been discussed before. – Asaf Karagila Jan 1 '13 at 19:15
• A related discussion: The scope of \newcommand is the entire page. Here is a poll, where you can vote which extensions should be included, in your opinion. – Martin Sleziak Jan 2 '13 at 12:46