This is going to be equal to our approximate area. Let's make it clear. Approximate area under the curve, just the sum of these rectangles. So let's evaluate this. So this is going to be equal to f of, it's going to be equal to the function evaluated at 1. 1 squared plus 1 is just 2. So it's going to be 2 times 1 half plus the function evaluated at 1.25.