Well that would be two P times one minus P and now we're going to multiply it by one minus P again so you're going to get one minus P squared. And so I think you see where this is going and we're just going to keep adding and adding and adding from there. So now we're going to do something really fun and interesting at least from a mathematical point of view. If this is equal to that, if the left hand side is equal to the right hand side, let's just subtract this value from both sides. So on the left hand side I would have the expected value of X, that's that, minus this. Minus one minus P times the expected value of X. So I'm just subtracting this from that side but let me subtract this from that side.