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