∫−10\int\limits_{-1}^{0}−1∫0 (x + 1)(x - 2) dx
= ∫−10\int\limits_{-1}^{0}−1∫0 x2−x−2x^2 - x - 2x2−x−2 dx
Integrated x2−x−2x^2 - x - 2x2−x−2 = x33− x22−2\;\frac{x^3}{3} - \;\frac{x^2}{2} -23x3−2x2−2
