Data:K12a247/HOMFLYPT Polynomial
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[math]\displaystyle{ z^6 a^{-2} +z^6 a^{-4} +z^4 a^{-2} +z^4 a^{-4} -2 z^4 a^{-6} -2 z^4+a^2 z^2+2 z^2 a^{-2} +2 z^2 a^{-4} -2 z^2 a^{-6} +z^2 a^{-8} -3 z^2+a^2+2 a^{-2} + a^{-4} - a^{-6} -2 }[/math]