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