− v 3 u 5 + 2 v 2 u 5 − v u 5 + 2 v 3 u 4 − 6 v 2 u 4 + 4 v u 4 − 2 v 3 u 3 + 9 v 2 u 3 − 8 v u 3 + u 3 + v 3 u 2 − 8 v 2 u 2 + 9 v u 2 − 2 u 2 + 4 v 2 u − 6 v u + 2 u − v 2 + 2 v − 1 {\displaystyle -v^{3}u^{5}+2v^{2}u^{5}-vu^{5}+2v^{3}u^{4}-6v^{2}u^{4}+4vu^{4}-2v^{3}u^{3}+9v^{2}u^{3}-8vu^{3}+u^{3}+v^{3}u^{2}-8v^{2}u^{2}+9vu^{2}-2u^{2}+4v^{2}u-6vu+2u-v^{2}+2v-1}
