Data:L10a165/Multivariable Alexander

[math]\displaystyle{ \frac{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}{\sqrt{u} \sqrt{v} \sqrt{w} \sqrt{x}} }[/math]