And then finally, you have the expected value of this thing, of two expected values. Well, that's just going to be the product of those two expected values. So that's just going to be plus, I'll freeze this, expected value of X times the expected value of Y. Now what do we have here? We have expected value of Y times the expected value of X, and then we are subtracting the expected value of X times the expected value of Y. These two things are the exact same thing. So this is going to be, and actually look at this, we're subtracting it twice and then we have one more.