The Manual
At the moment, the best example of LaTeXML’s output is the DLMF itself. There is, of course, a fair amount of insider, special case, code, but it shows what can be done.
Some highlights:
from the LaTeX manual, p.205. (TeX, )
an online editor/showcase of things that LaTeXML can do.
An experiment processing the entire http://arXiv.org.
And, of course
The Digital Library of Mathematical Functions was the primary instigator for this project.
The LaTeXML User’s manual ().
were produced using LaTeXML, as well.