You can. Not only the code is there, but also an interactive editor.

Agreed. It'd be super cool to see a Firefox/Chrome extension look for Latex equations on sites you were browsing and then cross-reference them against wiki/etc. and give them the math-equivalent of syntax highlighting.

Even more so if it worked with PDFs.

I already have way too many projects on the backburner right now... wink wink nudge nudge to anyone who wants to take this.

I experimented with something similar with LLMs. They can kinda do it for some stuff.

More interesting, you can ask a vision model to color parts of speech in img2img and it works OK for frontier models.