Data:L11n194/Multivariable Alexander

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[math]\displaystyle{ -\frac{3 t(2)^2 t(1)^2-4 t(2) t(1)^2+t(1)^2-4 t(2)^2 t(1)+9 t(2) t(1)-4 t(1)+t(2)^2-4 t(2)+3}{t(1) t(2)} }[/math]