2 ( u − 1 ) ( v − 1 ) ( v 4 − v 3 + v 2 − v + 1 ) u v 5 / 2 {\displaystyle {\frac {2(u-1)(v-1)\left(v^{4}-v^{3}+v^{2}-v+1\right)}{{\sqrt {u}}v^{5/2}}}}
