Data:K11a73/HOMFLYPT Polynomial

[math]\displaystyle{ z^8-2 a^2 z^6-z^6 a^{-2} +4 z^6+a^4 z^4-5 a^2 z^4-2 z^4 a^{-2} +5 z^4+a^4 z^2-a^2 z^2-a^4+3 a^2+ a^{-2} -2 }[/math]