There is a blog somewhere that has all the math equations on the chalkboards in porn. I have no idea who would make that haha. Sometimes there is really high-level stuff actually.
that's not the one I saw I don't think. The one I saw had some with pretty legit work done on the boards. It also had actual porn parts of the movie (blacked out). I don't really want to sift through a bunch of porn to find it though.