Delta x to the n divided by delta x. Well, that's delta x to the n minus 1, right? And then what are we doing now? Well, remember, we're taking the limit as delta x approaches 0. So as delta x approaches 0, pretty much every term that has a delta x in it, it becomes 0, right? We just, when you multiply by 0, you get 0. So every term, this first term has no delta x in it, but every other term does.