It doesn't appear that the method that math.stackexchange.com uses for typing equations is available in the DIY stack. Is there another markup that's being used instead?
The math-typing feature (which is named MathJax, by the way) is enabled on a few SE sites, but not this one at the moment. Our standard procedure when we get any request for a special site plugin like this is to ask for two things:
- community support on meta
- evidence that it would make a significant improvement to post quality
In other words, edit the question to include examples of several posts that would benefit from the use of the equation formatter and get it upvoted, and we'll reevaluate.