Data:L11a170/Multivariable Alexander

[math]\displaystyle{ -v^2 u^4+3 v u^4-2 u^4+5 v^2 u^3-11 v u^3+6 u^3-8 v^2 u^2+15 v u^2-8 u^2+6 v^2 u-11 v u+5 u-2 v^2+3 v-1 }[/math]