C261 Bo Jingfeng You will Laugh?

This formula is hard, and most people can't even figure it out, even for a first-class college science student, I'm afraid it'll take a long time.

Gu Wuyan wrote the formula on the blackboard. She hugged her chest and looked at it for a long time.

She calculated wrong again and again, erased it time and time again, and calculated again and again.

In the later half of the night