Another Day Another Differential Equation

Alex being cute

My one goal for today was to spend four hours studying. I think I did about five. Andrew came in to fine me holding the two halves of a torn piece of paper together puzzling over the contents.
Andrew looked at me quizzically, "did you tear up your homework?"
"Err..sort of... yes, err...it's not what you think," I fumbled
Andrew made his amused face. .
"I wasn't mad at it. Well I was, but that's not why I tore it."
I managed to explain that I tear my drafts in half to keep them separate from the finished product and Andrew laughed at me.