Data:L10a167/Multivariable Alexander

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