− 3 v 2 u 3 + 3 v u 3 − u 3 − 4 v 3 u 2 + 10 v 2 u 2 − 11 v u 2 + 4 u 2 + 4 v 3 u − 11 v 2 u + 10 v u − 4 u − v 3 + 3 v 2 − 3 v {\displaystyle -3v^{2}u^{3}+3vu^{3}-u^{3}-4v^{3}u^{2}+10v^{2}u^{2}-11vu^{2}+4u^{2}+4v^{3}u-11v^{2}u+10vu-4u-v^{3}+3v^{2}-3v}
