This question already has an answer here:
I would like to suggest a new feature that when reviewing suggested edits on sites that support MathJax that the suggested edit queue renders the MathJax in the rendered output view. The following suggested edit on Electrical Engineering is an example:
Personally I find that verifying the edit is valid is difficult when that view doesn't render the MathJax. I've been in the habit of opening a new window to paste the markup into a new question (that I discard) to view the rendered output, but it doesn't make for a very efficient workflow.