Related:

• Just as there are laws of Conservation of Matter and Energy, so there are in fact Laws of Conservation of Pain and Joy.
  Neither can ever be created or destroyed. But one can be converted into the other....
• It isn't homework unless it's due tomorrow.
• Von Neumann was the subject of many dotty professor stories.
  Von Neumann supposedly had the habit of simply writing answers to homework assignments on the board (the method of solution being, of course, obvious) when he was asked how to solve problems....
• Mr. Bergstrom: Lisa, your homework is always so neat.
  How can I put this? Does your father help you with it....
• Life can not be created or destroyed, it can only be screwed up.
• Homework time limit exceeded... Automatic logon commencing...
• Since no matter can be created or destroyed (excluding nuclear and cafeteria substances), as one attempts to remove unwanted material (i.
  e., trash) from one's living space, the remaining material mutates so as to occupy 30 to 50 percent more than its original volume....
• Mass-energy cannot be created or destroyed. It CAN, however, be wasted.