Data:K12a669/HOMFLYPT Polynomial

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[math]\displaystyle{ a^2 z^6+z^6 a^{-2} +z^6-a^4 z^4+4 a^2 z^4+4 z^4 a^{-2} -z^4 a^{-4} +3 z^4-3 a^4 z^2+5 a^2 z^2+5 z^2 a^{-2} -3 z^2 a^{-4} +z^2-2 a^4+3 a^2+3 a^{-2} -2 a^{-4} -1 }[/math]