And then finally you have the negative expected value of X times the negative expected value of Y. And the negatives cancel out. So you're just going to have plus the expected value of X times the expected value of Y. And of course it's the expected value of this entire thing. Now let's see if we can rewrite this. Well the expected value of the sum of a bunch of random variables is just the sum or difference of their expected values. So this is going to be the same thing.