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