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