I use equations. To enable equations in a WordPress blog, there are several options. The most comprehensive—and aesthetically pleasing—is to use MathJax. This post tells you how to install MathJax for your WordPress site. A second post has a few pointers. Here are a few usage examples.

#### 1. Edit default.js

I do not use the MathJax CDN since occasionally their site has problems. When that happens, your math stops working and your pages containing math become ugly. So I download MathJax to my WordPress install. Rather than futz with `<script>`

tags in my site’s header, I edit the default configuration file to my liking. Thus:

- Download the latest version of MathJax: go to https://github.com/mathjax/MathJax/, click on Releases, and download the latest version.
- Unpack the archive file to your hard drive.
- Edit
`default.js`

in the`config`

directory. My preferences:- You’ll probably want to add to your
`extensions`

, something like:

`extensions: ["tex2jax.js", "TeX/AMSsymbols.js", "TeX/AMSmath.js"]`

- Scroll down and set
`messageStyle`

to your liking (I changed mine to`messageStyle: "simple"`

). - Scroll down to
`menuSettings`

and change these to your liking (I set`zoom: "Hover"`

). - In the
`tex2jax`

section that immediately follows:- Under inlineMath uncomment the line with inline delimiters
`['$','$']`

. This enables normal LaTeX inline delimiters. You’ll have to escape actual dollar signs with \\\$. `processEscapes: true`

`preview: "[math]"`

- Under inlineMath uncomment the line with inline delimiters
- Scroll down to the
`TeX`

section.- Under
`equationNumbers`

, set`autoNumber: "AMS"`

. - Fiddle with whatever else there catches your fancy.

- Under
- Fiddle with whatever else catches your fancy.

- You’ll probably want to add to your
- Finally, upload your entire MathJax directory to your WordPress site, something like http://yourdomain/mathjax/.

#### 2. Get the WordPress plugin.

Next, get the MathJax-LaTeX plugin and set the settings. The easiest way is to go to your blog administration Dashboard→Plugins→Add New, and type mathjax in the search box. My plugin settings (Dashboard→Settings→MathJax-LaTeX) are

- Force Load = unchecked
- Default [latex] syntax attribute = inline (this seems to have no effect with my configuration)
- Use wp-latex syntax? = unchecked
- Use MathJax CDN Service? = unchecked
- Custom MathJax location? = http://yourdomain/mathjax/MathJax.js
- MathJax Configuration = default

**Do not forget to click the Save Changes button!**

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