Well let's see, I'm going to have one minus P and then if I subtract one P times one minus P from two P times one minus P, well I'm just going to be left with plus one P times one minus P. And then if I subtract this from that, I'm going to be left with one P times one minus P squared. And we're just going to keep going on and on and on. And so let me simplify this a little bit. If I distribute this negative, this could be plus and then this would be P minus one. And then if we distribute this expected value of X, we get on the left hand side, let me scroll up a little bit, I don't want to squinch it too much. So let's see, we have the expected value of X and then plus P times the expected value of X, P times the expected value of X minus the expected value of X. These cancel out.