Maybe I'm not aware of it, but I can't seem a way to figure out how to typeset math equations with the Steemit editor apart from inserting images which is not ideal for many types of posts.
I was wondering if this is something that the steemit.com team is considering adding, and if not, whether there's a demand for such a feature.
The simplest way of adding it would probably be to use a library such as Mathjax or Katex to render LaTex typesetted equations.