To include LaTeX formatting in a blog, one should just load the MathJax script if needed. The example below also loads AMSmath and AMSsymbols, so simple formatting goes easily. Put this on top of the page:
<script src="http://cdn.mathjax.org/mathjax/latest/MathJax.js" type="text/javascript">
MathJax.Hub.Config({
HTML: ["input/TeX","output/HTML-CSS"],
TeX: { extensions: ["AMSmath.js","AMSsymbols.js"],
equationNumbers: { autoNumber: "AMS" } },
extensions: ["tex2jax.js"],
jax: ["input/TeX","output/HTML-CSS"],
tex2jax: { inlineMath: [ ['$','$'], ["\\(","\\)"] ],
displayMath: [ ['$$','$$'], ["\\[","\\]"] ],
processEscapes: true },
"HTML-CSS": { availableFonts: ["TeX"],
linebreaks: { automatic: true } }
});
</script>
