That's n factorial over n minus k factorial times k factorial, normally I write these the other way around, but it's the same thing, times, let's see, lambda to the k, I'm just using my exponent properties, over n to the k. And then this expression right here, I can actually separate out the exponents. This is the same thing as 1 minus lambda over n to the n times 1 minus lambda over n to the minus k. You have the same base, you could add the exponents and you would get this up here. And let me simplify a little bit more. Let me swap spots with these two. You can kind of view them both as being in the denominator. So you can change the order of division or multiplication depending how you view it. So this is equal to the limit, let me switch colors, the limit as n approaches infinity, I don't like that color.