− v 2 u 4 + 3 v u 4 − 2 u 4 + 4 v 2 u 3 − 10 v u 3 + 5 u 3 − 6 v 2 u 2 + 13 v u 2 − 6 u 2 + 5 v 2 u − 10 v u + 4 u − 2 v 2 + 3 v − 1 {\displaystyle -v^{2}u^{4}+3vu^{4}-2u^{4}+4v^{2}u^{3}-10vu^{3}+5u^{3}-6v^{2}u^{2}+13vu^{2}-6u^{2}+5v^{2}u-10vu+4u-2v^{2}+3v-1}
