Data:L11a539/Multivariable Alexander

[math]\displaystyle{ -2 v u^3+2 v w u^3-w u^3+v x u^3-v w x u^3+w x u^3-x u^3+u^3+4 v u^2-4 v w u^2+2 w u^2-2 v x u^2+2 v w x u^2-3 w x u^2+3 x u^2-2 u^2-3 v u+3 v w u-2 w u+2 v x u-2 v w x u+4 w x u-4 x u+2 u+v-v w+w-v x+v w x-2 w x+2 x-1 }[/math]