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