Data:K12a521/HOMFLYPT Polynomial
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[math]\displaystyle{ z^8 a^{-4} -2 z^6 a^{-2} +5 z^6 a^{-4} -2 z^6 a^{-6} -8 z^4 a^{-2} +9 z^4 a^{-4} -8 z^4 a^{-6} +z^4 a^{-8} +z^4-7 z^2 a^{-2} +9 z^2 a^{-4} -8 z^2 a^{-6} +3 z^2 a^{-8} +3 z^2- a^{-2} +3 a^{-4} -3 a^{-6} + a^{-8} +1 }[/math]