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