<p>I can think of a couple of ways...</p>

<ol>
<li><p>You can flag it and ask us diamond-mods to delete</p></li>
<li><p>You can disable MathJax, delete and then enable MathJax.</p></li>
</ol>

<hr>

<p>You may also find the formatting sandbox in meta.math.stackexchange to be useful when typing complex mathematics for a comment.</p>

<p><a href="http://meta.math.stackexchange.com/questions/370/formatting-sandbox">http://meta.math.stackexchange.com/questions/370/formatting-sandbox</a></p>
