All we're doing here is, this is 15 over y dy. So let's evaluate this. So we take the antiderivative of 15 over y, and then evaluate at these two points. So this is going to be equal to, antiderivative of one over y is going to be the natural log of the absolute value of y. So it's 15 times the natural log of the absolute value of y. And then we're going to evaluate that at our endpoints. So we're gonna evaluate it at e to the third and at e. So let's first evaluate at e to the third.