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