In my Larson-Hostetler-Edwards Calculus book they encourage students to write a change of variable integration in two different forms. Example: Integral(x * sqrt(x + 2) dx) can be written as (2/5)(x + 2) ^ (5/2) - (4/3)(x + 2) ^ (3/2) +C OR a more attractive version but more work is (2/15)(x + 2) ^ (3/2) * (3x -4) + C. That example is not that bad but some of the other ones can be intense. Do I need to have students be able to write them in both forms? The algebra can get pretty messy(for students).