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