You do the math!= think hard.
认真想想。

与do有关的句子：
Do the right thing
做点正事吧。
Do as I say not as I do.
按我说的做，不要跟着我做。
Do your homework!
快做作业！
I really don't want to do the housework but I have to.
我真的很不想打扫卫生，但不得不做。
Did you do the dishes?
你刷碗了吗？
I have to do laundry today.
我今天要洗衣服！
Doing housework is a kind of exercise for me.
做家务对我来说是一种运动。
I'll do dishes for you!
我来刷碗！