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