It's been a while.

I had to improvise a bit on today's exam... there was a whole question on which I was totally in the dark. So, I looked at the equations given, tried to find the ones which solved for variables I was looking for, and plugged away.

I haven't had to do that in a while.. and I will study more rigorously in the future to avoid such things. They make me squirm.

Dammit! Must....pass....all....classes.......