View (X-1)^2 Integration Pictures. Enter the function you want to integrate into the editor. Solve definite and indefinite integrals (antiderivatives) using this free online calculator.
If you leave the $1/2$ in the integral and do the most obvious substitution (recall your first step?), you will get something that should look like the definition of the function in @t.b.'s link.
This is like the example we just did, but now we expect that all area is positive (imagine we had to paint it). The integral calculator will show you a graphical version of your input while you type. This online calculator will find the indefinite integral (antiderivative) of the given function, with steps shown (if possible). This is a calculator which computes definite and indefinite integral of a function with respect to a variable x.