So this thing up here, this n times n minus 1 times n minus 2, all the way down to n minus k plus 1, what's it going to look like? It's going to be a polynomial, right? We're multiplying a bunch of binomials. We're doing it k times. So the largest degree term is going to be n to the k, right? It's going to be n to the k plus something times n to the k minus 1. It's going to be this big kind of binomial, this big polynomial, kth degree polynomial.