Mathematics (Part 3)

Click here for Part 1.
Click here for Part 2.

Neither Andrea nor Dave could figure out the mathematics on the board in order to swap back. Andrea seemed rather relaxed about everything, but Dave was starting to panic.

He grabbed Andrea’s collar and screamed, “Come on! I’ve been working at this equation for hours with no luck. You just glanced at it and dismissed it. If I am unable to figure it out, it means that you MUST be able to. The least you could do is give it a try.”

“Okay, okay!” Andrea relented, “I’ll give it a longer look, but I don’t know what you expect. I’m just not as smart as you even if I do have your brain chemistry now!”