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