Negative two sine of x. Well the derivative of cosine of x is negative sine of x, so this is just going to be two cosine of x. And you can verify that derivative of cosine of x is negative sine of x, you have the two out front, so it's negative two sine of x. So we're going to evaluate that at zero and at negative one. And to that we're going to add, so let's do this definite integral over here. The antiderivative of e to the negative four x, the antiderivative is going to be equal to negative e to the negative four x over four. And the way you realize that is, if this was just an e to the x, then its antiderivative would just be e to the x.