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