− 3 v 3 u 3 + 3 v 2 u 3 − v u 3 + 3 v 3 u 2 − 8 v 2 u 2 + 5 v u 2 − u 2 − v 3 u + 5 v 2 u − 8 v u + 3 u − v 2 + 3 v − 3 {\displaystyle -3v^{3}u^{3}+3v^{2}u^{3}-vu^{3}+3v^{3}u^{2}-8v^{2}u^{2}+5vu^{2}-u^{2}-v^{3}u+5v^{2}u-8vu+3u-v^{2}+3v-3}
