Summing up most of high school math in one sentence:

Lol

Lollzzz. I failed at math sooo much because I simply didn't want to take 10 extra steps to "show my work" when I got the correct answer in 2-3 steps(that and I challenged myself to do mental math as much as possible, so it really pissed off my math teachers to see only the initial set-up and final answer without anything in between)

I can sum it up to 1 word...:
AEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
Jk jk lol
Interesting sum up lol