30 minus 20 is 10 squared, which is 100 divided by 20, which is 5. I might not be able to do all of them in my head like this. Plus, actually let me just write it this way, just so you see what I'm doing. This is going to be 100, this right here is 100 over 20. Plus 14 minus 20 is negative 6 squared is positive 36. So plus 36 over 20. Plus 34 minus 30 is 4 squared is 16.