> int( (x-1)^2 * e^(-2*x), x);
                                                                        2
     exp(-2 x ln(e))       exp(-2 x ln(e))       exp(-2 x ln(e))       x  exp(-2 x ln(e))
-1/2 --------------- + 1/2 --------------- - 1/4 --------------- - 1/2 ------------------
          ln(e)                     2                     3                  ln(e)
                               ln(e)                 ln(e)

           (2 ln(e) - 1) x exp(-2 x ln(e))
     + 1/2 -------------------------------
                            2
                       ln(e)


> int( (x-1)^2 * exp(-2*x), x);
                                             2
                             -1/2 exp(-2 x) x  + 1/2 exp(-2 x) x - 1/4 exp(-2 x)