u v 2 w 4 − u v w 3 + u v w 2 − v w 2 + v w − 1 u v w 2 {\displaystyle {\frac {uv^{2}w^{4}-uvw^{3}+uvw^{2}-vw^{2}+vw-1}{{\sqrt {u}}vw^{2}}}}
