− ( u − 1 ) ( v − 1 ) ( 2 u 2 v 2 − 2 u v 2 + 7 u v − 2 u + 2 ) u 3 / 2 v 3 / 2 {\displaystyle -{\frac {(u-1)(v-1)\left(2u^{2}v^{2}-2uv^{2}+7uv-2u+2\right)}{u^{3/2}v^{3/2}}}}
