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