My February '95 Statistics 462 midterm notes. In .
So yes, WordPress does , but it is finicky and missing a lot of functionality. If you try to use that doesn’t work inside the math environment (such as begin{align} ... end{align}), it wont parse. Also, you need to use the displaystlye keyword judiciously.
Edit: I've uninstalled JetPack and so lost its Beautiful Math feature. Therefore I've installed the WP LaTeX plugin. It is more configurable, and can offload formatting to a real running alongside WordPress. With a little hacking I've got {align} going. Why someone thought is was sensible to limit WordPress' support to the math environment is beyond me.
One requirement of the WP LaTeX plugin is that the WP unformatted plugin is also installed, so that the wptexturize() function can be disabled on posts.