So right now, to write up a question for Math.StackExchange, I use Firefox to come here, say I'm going to ask a question, and start typing in the box (like I am now). The only way I have to test whether my MathJax markup is correct is to type it here, and see what I get in the preview box. If I'm writing a long question, I have to copy back and forth between here and Notepad, in case I get interrupted.
This seems really klutzy. It's 2012; I should have a better way to test my MathJax input, like a desktop program that interprets MathJax, or a Google Docs application. Can anyone suggest a better approach? Yes, I'm a Windows user, by the way.
Thanks for any help.