dzejkej/mathjax-bookmarklet — pull request #3 by christianp (2013-01-26 16:57:54+00:00)
Title: Add fix for Google+

Google+ uses some CSS class names that MathJax also uses, since they're the names of MathML elements.
This version appends a style tag to the page to override Google+'s styles and make the MathJax elements inherit the styles of their parents, as MathJax assumes should be the case.