I could call that plus c one. And if you're integrating, now that's going to be equal to, now the right-hand side we're integrating with respect to x. And let's see, you could do u substitution, or you could recognize that look, the derivative of negative x squared is going to be negative two x. So if that was a two there, and if you don't want to change the value of the integral, you put the 1 1 2 right over there. So now you could either do u substitution explicitly, or you could do it in your head, where you said u is equal to negative x squared, and then du will be negative two x dx, or you can kind of do this in your head at this point. So I have something and its derivative, so I really could just integrate with respect to that something, with respect to that u. So this is going to be 1 1 2, this 1 1 2 right over here.