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