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