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