I've been casting about for a way to show mathematical symbols easily in these blog postings. This problem has of course already been solved. There are a number of options, such as MathJax and KaTex for example.

I've chosen MathJax as it seems a bit simpler and more appropriate to my needs.

To get it working here on Squarespace I found a good example on Stackoverflow. In short, go to settings->advanced and then to the code injection section.

In the header put:

```
<script type="text/javascript" src="//cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
</script>
```

In the footer put:

```
<script>
MathJax.Hub.Queue(["Typeset",MathJax.Hub]);
</script>
```

And before you can say "Algebraic!", here is a lovely equation:

$$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$