− ( u − 1 ) ( v − 1 ) ( 2 u 2 v − u 2 + u v 2 − u v + u − v 2 + 2 v ) u 3 / 2 v 3 / 2 {\displaystyle -{\frac {(u-1)(v-1)\left(2u^{2}v-u^{2}+uv^{2}-uv+u-v^{2}+2v\right)}{u^{3/2}v^{3/2}}}}
