Data:K12a684/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-z^2 a^{-2} -3 z^2 a^{-6} +z^2 a^{-8} -4 z^2+2 a^2- a^{-2} + a^{-4} - a^{-6} + a^{-8} -1 }[/math]