Data:K13n2313/HOMFLYPT Polynomial
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[math]\displaystyle{ z^8 a^{-2} +4 z^6 a^{-2} -z^6 a^{-4} -2 z^6+a^2 z^4+5 z^4 a^{-2} -2 z^4 a^{-4} -4 z^4-z^2 a^{-2} +2 z^2-2 a^2-4 a^{-2} + a^{-4} +6 }[/math]