− 2 v 2 u 2 + 5 v u 2 − 3 u 2 + 5 v 2 u − 9 v u + 5 u − 3 v 2 + 5 v − 2 {\displaystyle -2v^{2}u^{2}+5vu^{2}-3u^{2}+5v^{2}u-9vu+5u-3v^{2}+5v-2}
