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