Data:L10a71/Multivariable Alexander

[math]\displaystyle{ -v^2 u^4+2 v u^4-u^4+4 v^2 u^3-7 v u^3+3 u^3-5 v^2 u^2+11 v u^2-5 u^2+3 v^2 u-7 v u+4 u-v^2+2 v-1 }[/math]