− 3 v u 3 + 4 u 3 + 8 v u 2 − 10 u 2 − 10 v u + 8 u + 4 v − 3 {\displaystyle -3vu^{3}+4u^{3}+8vu^{2}-10u^{2}-10vu+8u+4v-3}