− v 3 u 5 + v 2 u 5 + 2 v 3 u 4 − 4 v 2 u 4 + 2 v u 4 − 2 v 3 u 3 + 7 v 2 u 3 − 6 v u 3 + u 3 + v 3 u 2 − 6 v 2 u 2 + 7 v u 2 − 2 u 2 + 2 v 2 u − 4 v u + 2 u + v − 1 {\displaystyle -v^{3}u^{5}+v^{2}u^{5}+2v^{3}u^{4}-4v^{2}u^{4}+2vu^{4}-2v^{3}u^{3}+7v^{2}u^{3}-6vu^{3}+u^{3}+v^{3}u^{2}-6v^{2}u^{2}+7vu^{2}-2u^{2}+2v^{2}u-4vu+2u+v-1}
