Great that it's only injected on pages that use it

Up to now I’ve been using the Simple Mathjax plugin, which also works well, but is not able to inject the mathjax dependency selectively.

On my sites I have math only on a very few pages, and MathJax-LaTeX enables me to enable mathjax only on those pages by just adding the [mathjax] shortcode somewhere.

Importantly, remember to disable Jetpack Beautiful Math, else it can interfere with MathJax-LaTeX. (at the time of writing, Jetpack is still turning math into bitmaps, which is not nearly as beautiful as MathJax on capable browsers).

See https://vxlabs.com/2014/06/16/level-sets-the-practical-10-minute-introduction/ for an example.