# Easily Add LaTeX Support To Jekyll

In my own writing (and now with AllAboutCircuits) I’ve found myself using a ton of LaTeX for circuit equations. It gets the point across so much more nicely than notes scrawled on engineering paper, and looks clean and professional. (Plus, let’s face it - my handwriting is chickenscratch on a good day.) I had a few sticking points getting it into my blog, but this Stack Overflow post got me on the right track. You just need to add the following line into your Jekyll post templates:

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

Plop that into the top of your Jekyll post template, and your LaTeX equations will render nicely, like this subset of the wave equation derivation: \[\frac{\delta E_{x}}{\delta t} = \frac{\delta f(z-ct)}{\delta t} = f^{\prime}(z - ct)\Big(\frac{\delta(z-ct)}{\delta t}\Big) = -c*f^{\prime}(z - ct)\] \[\frac{\delta^2 E_{x}}{\delta t^2} = \frac{\delta}{\delta t} \Big(\frac{\delta Ex}{\delta t}\Big)= f^{\prime\prime}(z - ct)\Big(\frac{\delta(z-ct)}{\delta t}\Big) = c^2*f^{\prime\prime}(z - ct)\]

Here’s the original LaTex, if you’re interested in trying it out yourself:

```
\frac{\delta E_{x}}{\delta t} = \frac{\delta f(z-ct)}{\delta t} = f^{\prime}(z - ct)\Big(\frac{\delta(z-ct)}{\delta t}\Big) = -c*f^{\prime}(z - ct)
\frac{\delta^2 E_{x}}{\delta t^2} = \frac{\delta}{\delta t} \Big(\frac{\delta Ex}{\delta t}\Big)= f^{\prime\prime}(z - ct)\Big(\frac{\delta(z-ct)}{\delta t}\Big) = c^2*f^{\prime\prime}(z - ct)
```

Do that math, make that paper!