( w − 1 ) ( 2 u v w 3 + u w 4 − u w 3 − v w + v + 2 w ) u v w 5 / 2 {\displaystyle {\frac {(w-1)\left(2uvw^{3}+uw^{4}-uw^{3}-vw+v+2w\right)}{{\sqrt {u}}{\sqrt {v}}w^{5/2}}}}
