u 4 v 3 − u 4 v 2 + u 3 v 4 − 4 u 3 v 3 + 6 u 3 v 2 − 4 u 3 v + u 3 − 2 u 2 v 4 + 7 u 2 v 3 − 11 u 2 v 2 + 7 u 2 v − 2 u 2 + u v 4 − 4 u v 3 + 6 u v 2 − 4 u v + u − v 2 + v u 2 v 2 {\displaystyle {\frac {u^{4}v^{3}-u^{4}v^{2}+u^{3}v^{4}-4u^{3}v^{3}+6u^{3}v^{2}-4u^{3}v+u^{3}-2u^{2}v^{4}+7u^{2}v^{3}-11u^{2}v^{2}+7u^{2}v-2u^{2}+uv^{4}-4uv^{3}+6uv^{2}-4uv+u-v^{2}+v}{u^{2}v^{2}}}}
