Solving systems of 3-D equations.
Gawd, it takes like at least 10 minutes if you're doing them right.
But me, I make a simple error or two.
The math isn't hard, just long and with complicated, convoluted situations.
So I mix up a few signs, add things together wrong, and before I know it I'M WORKING EVERY PROBLEM 3 TIMES OVER AND CHECKING IT TWICE.
Gonna find out who's naughty and nice.
By that I mean it took me an hour to do 3 problems. When will I ever need to know how to find where 3 planes intersect?
It's kinda fun though, I feel so clever when I work all that math...