If you would like to simplify the polynomial (7x^3 - 4x^2 + 5x) - (3x^3 - 11x + 2), you can do this using the following steps:
(7x^3 - 4x^2 + 5x) - (3x^3 - 11x + 2) = 7x^3 - 4x^2 + 5x - 3x^3 + 11x - 2 = 4x^3 - 4x^2 + 16x - 2
The correct result would be 4x^3 - 4x^2 + 16x - 2.