Data:L11n447/Multivariable Alexander

[math]\displaystyle{ -v u^3+v w u^3-w u^3+v x u^3-x u^3+u^3+v u^2-2 v w u^2+2 w u^2-2 v x u^2+2 x u^2-u^2+2 v w u-2 w u+2 v x u-v w x u+w x u-2 x u-v w+w-v x+v w x-w x+x }[/math]