− 2 v 3 u 3 + 4 v 2 u 3 − 2 v u 3 + 2 v 3 u 2 − 11 v 2 u 2 + 9 v u 2 + 9 v 2 u − 11 v u + 2 u − 2 v 2 + 4 v − 2 {\displaystyle -2v^{3}u^{3}+4v^{2}u^{3}-2vu^{3}+2v^{3}u^{2}-11v^{2}u^{2}+9vu^{2}+9v^{2}u-11vu+2u-2v^{2}+4v-2}
