It seems by enabling inline mathjax, I lose the WYSIWYG editor. I added this to my header:

<script type="text/javascript" src="MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>

<script type="text/x-mathjax-config">

MathJax.Hub.Config({

extensions: ["tex2jax.js"],

jax: ["input/TeX", "output/HTML-CSS"],

tex2jax: {

inlineMath: [ ['$','$'], ["\\(","\\)"] ],

displayMath: [ ['$$','$$'], ["\\[","\\]"] ],

processEscapes: true

},

"HTML-CSS": { availableFonts: ["TeX"] }

});

</script>

<script type="text/javascript" src="MathJax.js">