− 2 v u 5 + 2 v u 4 − 2 v u 3 + u 3 + v u 2 − 2 u 2 + 2 u − 2 {\displaystyle -2vu^{5}+2vu^{4}-2vu^{3}+u^{3}+vu^{2}-2u^{2}+2u-2}
