And this is going to be, and I'm going to evaluate this at the bounds. So I'm going to evaluate this at, and I'll do this in different colors, I'm going to evaluate it at eight, and I'm going to evaluate it at negative one, and I'm going to subtract it, evaluate it at negative one from this expression evaluated at eight. And so what is this going to be equal to? Well, actually, let me simplify a little bit more. What is 12 divided by 4 3rds? So 12, I'll do it right, well, I'll do it right over here. 12 over 4 3rds is equal to 12 times three over four, which we could use 12 over one times three over four.