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