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