u v w x − 2 u v w − 2 u v x + 2 u v − 2 u w x + 2 u w + 3 u x − 2 u − 2 v w x + 3 v w + 2 v x − 2 v + 2 w x − 2 w − 2 x + 1 u v w x {\displaystyle {\frac {uvwx-2uvw-2uvx+2uv-2uwx+2uw+3ux-2u-2vwx+3vw+2vx-2v+2wx-2w-2x+1}{{\sqrt {u}}{\sqrt {v}}{\sqrt {w}}{\sqrt {x}}}}}
