Let me make it clear. We could write this as a minus 1 dy dx. So we can essentially just add these two coefficients. So this simplifies to 2y minus 2x minus 1 times the derivative of y with respect to x, which is going to be equal to, on this side, this cancels out. We are left with 1 minus 2x plus 2y. So let me write it that way. We could write this as negative 2y is just a positive 2y.