That's x squared plus 2xh plus h squared. And then we have this minus x squared over here. I just multiplied this guy out over here. And then all of that is divided by h. Now let's see if we can simplify this a little bit. Well, you immediately see you have an x squared and you have a minus x squared. So those cancel out. And then we could divide the numerator and the denominator by h. So this simplifies too.