− ( w − 1 ) ( u 2 v 2 w 2 − 2 u 2 v 2 w − u 2 v w 2 + 3 u 2 v w − u 2 v − u 2 w + u 2 − 2 u v 2 w 2 + 3 u v 2 w + 2 u v w 2 − 7 u v w + 2 u v + 3 u w − 2 u + v 2 w 2 − v 2 w − v w 2 + 3 v w − v − 2 w + 1 ) u v w 3 / 2 {\displaystyle -{\frac {(w-1)\left(u^{2}v^{2}w^{2}-2u^{2}v^{2}w-u^{2}vw^{2}+3u^{2}vw-u^{2}v-u^{2}w+u^{2}-2uv^{2}w^{2}+3uv^{2}w+2uvw^{2}-7uvw+2uv+3uw-2u+v^{2}w^{2}-v^{2}w-vw^{2}+3vw-v-2w+1\right)}{uvw^{3/2}}}}
