Data:K12n274/HOMFLYPT Polynomial

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[math]\displaystyle{ -2 z^4 a^{-2} -z^4+a^2 z^2-3 z^2 a^{-2} +4 z^2 a^{-4} -2 a^{-2} +4 a^{-4} -2 a^{-6} +1 }[/math]