− v 2 u 6 + v u 6 + v 2 u 5 − v u 5 + u 5 − v 2 u 4 + v u 4 − u 4 + v 2 u 3 − v u 3 + u 3 − v 2 u 2 + v u 2 − u 2 + v 2 u − v u + u + v − 1 {\displaystyle -v^{2}u^{6}+vu^{6}+v^{2}u^{5}-vu^{5}+u^{5}-v^{2}u^{4}+vu^{4}-u^{4}+v^{2}u^{3}-vu^{3}+u^{3}-v^{2}u^{2}+vu^{2}-u^{2}+v^{2}u-vu+u+v-1}
