− 2 v u 3 + u 3 − 4 v 2 u 2 + 5 v u 2 − 2 u 2 − 2 v 3 u + 5 v 2 u − 4 v u + v 3 − 2 v 2 {\displaystyle -2vu^{3}+u^{3}-4v^{2}u^{2}+5vu^{2}-2u^{2}-2v^{3}u+5v^{2}u-4vu+v^{3}-2v^{2}}
