So what am I going to end up doing? Well, I'm essentially going to end up having the negative value of this. So this is going to be equal to the negative of the integral from a to b of f of x dx. And so this is the result we get, which is another really important integration property that if you swap, if you swap the bounds of integration, and it really just comes from this idea. Instead of delta x being b minus a, if you swap the bounds of integration, it's going to be a minus b. You're going to get the negative delta x, or the negative of your original delta x, which is going to give you the negative of this original value right over here. And once again, this is a really, really useful integration property where you're trying to make sense of some integrals and even sometimes solve some of them.