And now the derivative of e to the negative 2x squared over here, I'll do this in this pink color, so this part right over here, that is going to be equal to, or just apply the chain rule, derivative of e to the negative 2x squared with respect to negative 2x squared, well that's just going to be e to the negative 2x squared, and we're going to multiply that times the derivative of negative 2x squared with respect to x. And so that's going to be what? Negative 4x. So times negative 4x, and of course we have this x over here. We have that x over there, and let's see, can we simplify it? Can we simplify it at all? Well obviously both of these terms have an e to the negative 2x squared.