[list=1][*]In the input bar enter: [b]f(x)=x^2[/b][/*][*]Add a new point [b]A[/b] on the x-axis[/*][*]Add a new point [b]B[/b] on the x-axis (to the right of [b]A[/b])[/*][*]In the input bar enter: [b]a=x(A)[/b][/*][*]In the input bar enter [b]b=x(B)[/b][/*][*]In the input bar enter [b]Integral[f,a,b][/b][/*][/list]