− u 3 v 3 − u 3 v 2 − 2 u 2 v 3 + 6 u 2 v 2 − 4 u 2 v + u 2 + u v 3 − 4 u v 2 + 6 u v − 2 u − v + 1 u 3 / 2 v 3 / 2 {\displaystyle -{\frac {u^{3}v^{3}-u^{3}v^{2}-2u^{2}v^{3}+6u^{2}v^{2}-4u^{2}v+u^{2}+uv^{3}-4uv^{2}+6uv-2u-v+1}{u^{3/2}v^{3/2}}}}
