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