Omnipotence
Kendrick Lamar
4-5 hours? If so, you're seriously neglecting your other subjects.You may as well do it because you like maths. I suggest you do it because you can always drop it.
Studyingg is different for everyone, it really depends how good you are personally i try to do ~3 a day so i believe if you do 4U you may wanna try for ~4-5 a day. However this is just me
I say do it, see how you go, if you suck drop it, if you do ok keep it