− v u 5 + 2 v u 4 + 2 u 4 + v u 3 − 3 u 3 − 3 v u 2 + u 2 + 2 v u + 2 u − 1 {\displaystyle -vu^{5}+2vu^{4}+2u^{4}+vu^{3}-3u^{3}-3vu^{2}+u^{2}+2vu+2u-1}
