F.A.T.A.L. is known for its graphic violent and sexual content, as well as the complexity of the underlying game system, involving higher-level mathematics
I dunno about "higher level" maths, but there is one bit where you're asked to solve a simple year 8–level algebra equation (which is still a much higher level than any other RPG I've ever played asks you to do). It's also in one of the more explicitly NSFW parts of the system.
Specifically, you have to solve for y: (BT – 80)2 = –4y + 120, where BT is a number arrived at in an earlier step, using (CM / CV/A ) × 100. I will not be defining what CM and CV/A are in this forum in order to keep the comments SFW.
Hah. I was mostly just joking as it included higher maths in the same sentence as the highly sexually explicit content. But that's interesting that they decided to implement such a convoluted way of getting to stats instead of just simplifying it with a table.