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