Data:L9a21/Multivariable Alexander

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\frac{\left(t(1) t(2)^2-t(1) t(2)+t(2)+t(1)-1\right) \left(t(1) t(2)^2-t(2)^2-t(1) t(2)+t(2)-1\right)}{t(1) t(2)^2}