# Does MathJax or some math markup work on this site?

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I found an old post saying that MathJax is enabled using the ∑ button in the Edit window. But this button doesn't seem to be there.

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I'm pretty sure you can just use math bbcode tags, as in

[ math]\frac{-b \pm \sqrt{b^2 - 4ac}}{2a}[/ math]

without spaces produces

$\frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

Unfortunately you have to reload the page after you post for MathJax to notice the tags in it...