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