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