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