Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
I've written a script that lets you insert dollar symbols automatically(via a keyboard shortcut or button) in the editor window on Stack Exchange sites that support MathJax. Feel free to check it out.
Installation instructions and details here