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