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