− u 3 v 2 − 2 u 3 v + u 3 + u 2 v 3 − 5 u 2 v 2 + 7 u 2 v − 2 u 2 − 2 u v 3 + 7 u v 2 − 5 u v + u + v 3 − 2 v 2 + v u 3 / 2 v 3 / 2 {\displaystyle -{\frac {u^{3}v^{2}-2u^{3}v+u^{3}+u^{2}v^{3}-5u^{2}v^{2}+7u^{2}v-2u^{2}-2uv^{3}+7uv^{2}-5uv+u+v^{3}-2v^{2}+v}{u^{3/2}v^{3/2}}}}
