HTML export of math environments

[karthink]

I have a math environment like this in an org document:

\[
\sin^{2 + \alpha}(x) + \cos^{2 + \beta}(x) \approx 1
\]

When I render the html output using org-ruby --translate html equation.org, I get:

<p>\[
  sin<sup>2 + &alpha;</sup>(x) + cos<sup>2 + &beta;</sup>(x) &asymp; 1
  \]</p>

This output is incorrect, since org needs to leave the contents of math environments untouched. This lets MathJax then handle the conversion to MathML and subsequent display in a browser. HTML export from Emacs produces the following instead:

<div id="content">
<p>
\[
\sin^{2 + \alpha}(x) + \cos^{2 + \beta}(x) \approx 1
\]
</p>
</div>