They're actually going to be the focus of the next version (named "Euler"), so you can show them our first research paper test case. That's a real paper, we pulled off of open access.
You can see, that we still need to render embedded Asciidoc and LaTeX properly and fix the footnotes, and stuff, but you can get the general idea. Euler will also allow them to export to LaTeX files, which is nice.
I used my CLI for uploading, but if they wait a couple of weeks, they can upload over #Alexandria, which will be more comfy.