I noticed on this post that the user has removed the body/equation in his main post twice, amid a warning of suspension (as noted in the comments) by Zev Chonoles. Is there anything I should do beyond editing his post to put his equation and whatnot back in there?
Thank you for pointing this out - I've suspended the relevant user. Notifying the moderators and rolling back the destructive edit is all you need to do (you could also leave a comment explaining your reasoning for undoing the edit if you want). Though for the future, this kind of thing is better suited to a moderator flag than a meta post.