And the notation makes it look like a fraction, because intuitively that's what we're doing. But if you were to treat them like fractions, then you could think about canceling that and that. And once again, this isn't a rigorous thing to do, but it can help with the intuition. And then what you're left with is the derivative of this whole sine of x squared with respect to x. So you're left with the derivative of essentially our original function, sine of x squared with respect to x. Which is exactly what dh dx is. This right over here is our original function h. That's our original function h. So it might seem a little bit daunting now.