We just incremented the exponent and divided by that incremented exponent minus, same idea here, five x to the third over three plus four x. And then we are going to evaluate it at one and then subtract from that it evaluated at negative one. So let's first evaluate it at one. We're gonna get 1 5th minus 5 3rds plus four. And now let us evaluate it at negative one. So minus, let's see, if this is negative one, we're gonna negative 1 5th, negative 1 5th, and this is gonna be plus 5 3rds, plus 5 3rds, and then this is going to be minus four, minus four. But then when you distribute the negative sign, this, so we're gonna distribute this over all of these terms.