How to do superscript markup?
I wrote an answer where I needed to say "square meters". I wanted to write this as "m" followed by a superscript "2". I tried writing "m<sup>2</sup>". That worked in the preview, so I left it that way. Unfortunately, after posting the answer it was written just as "m2", not what I intended.
How to write superscripts (and subscripts while we're at it) in this system? I looked around, but couldn't find any help for the markup language, other than hover text for the button above the edit window. None of those deal with superscripts or subscripts.