− u v − u w 4 + u w 3 − u w 2 + u w − v w 4 + v w 3 − v w 2 + v w + w 5 u v w 5 / 2 {\displaystyle {\frac {-uv-uw^{4}+uw^{3}-uw^{2}+uw-vw^{4}+vw^{3}-vw^{2}+vw+w^{5}}{{\sqrt {u}}{\sqrt {v}}w^{5/2}}}}