But the more important thing is that you know when to use it. So for example, if I were to take the integral of, let's say, x squared plus cosine of x, the indefinite integral of that, we now know, and it's going to be useful in the future, say, well, this is the same thing as the integral of x squared dx plus the integral of cosine of x dx. So this is the same thing as that plus that. And then you can separately evaluate them. And this is helpful because we know that if we are trying to figure out the integral of, let's say, pi times sine of x dx, that we can take this constant out. Pi is in no way dependent on x. It's just going to stay being equal to pi.