Data:K12n620/HOMFLYPT Polynomial
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[math]\displaystyle{ 2 z^6 a^{-4} -4 z^4 a^{-2} +6 z^4 a^{-4} -3 z^4 a^{-6} -7 z^2 a^{-2} +8 z^2 a^{-4} -4 z^2 a^{-6} +z^2 a^{-8} +2 z^2-3 a^{-2} +3 a^{-4} - a^{-6} +2 }[/math]