So we have this minus this. So we have this minus, we're going to subtract this. Or we could add the negative of it. So we'll put negative x squared plus 8x minus 16. So I'm just going to add the negative of this. And we get, and I'll do this in a new color, let's see, we get x to the fourth minus 4x to the third power minus 5x squared plus 24x. And then these cancel out.