What is a really complicated word for a type of really complicated math?

So I'm looking for the most complicated-sounding word for a type of math anyone can think of! The math doesn't even have to be hard, it just has to sound hard. And if possible a course you take in highschool :)
Update: I like differential grand-unification theory the most, but sadly, it's not actually a course name, so I'm going to use integrated algerbra. Thanks everyone :)
Update 2: Oh and trigonometry is awesome too but anyone who has actually done it knows it's really simple so I'm not sure if it'll work.
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