And then to that, we have these common terms. We have this minus 2m, minus 2m, minus 2m. So we can distribute those out. And so this actually, I should actually write it like this. So we have a minus 2m times, once we distribute it out, here we're just going to be left with a y1 x1. Maybe I could call it an x1 y1. x1 y1, that's that over there with the 2m factored out.