Data:L11n440/Multivariable Alexander

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