( u − 1 ) ( v − 1 ) ( u v + v 2 − v + 1 ) ( u v 2 − u v + u + v ) u 3 / 2 v 5 / 2 {\displaystyle {\frac {(u-1)(v-1)\left(uv+v^{2}-v+1\right)\left(uv^{2}-uv+u+v\right)}{u^{3/2}v^{5/2}}}}
