Data:L10a84/Multivariable Alexander

[math]\displaystyle{ -v^2 u^4+2 v u^4-u^4+2 v^2 u^3-6 v u^3+3 u^3-3 v^2 u^2+7 v u^2-3 u^2+3 v^2 u-6 v u+2 u-v^2+2 v-1 }[/math]