Data:L11a328/Multivariable Alexander

[math]\displaystyle{ -2 v^3 u^3+4 v^2 u^3-2 v u^3+3 v^3 u^2-9 v^2 u^2+7 v u^2-u^2-v^3 u+7 v^2 u-9 v u+3 u-2 v^2+4 v-2 }[/math]