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