Sometimes you'll see people write a little line here too, where they'll say we're going to evaluate it at 4 and then at 1, but I'll just do it without the line. So we're going to evaluate this thing at 4, and from that subtract it, evaluate it at 1. So this is going to be equal to 4 to the third power of 64, so it's going to be 64 over 3. Let me color code it. This right over here is this right over there, and then from that we're going to subtract this business evaluated at 1. Well, when you evaluate it at 1, you get 1 to the third is 1 over 3. You get 1 third.