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