Data:K12a537/HOMFLYPT Polynomial

[math]\displaystyle{ z^6 a^{-2} +z^6 a^{-4} +z^4 a^{-4} -2 z^4 a^{-6} -2 z^4+a^2 z^2-z^2 a^{-2} +3 z^2 a^{-4} -2 z^2 a^{-6} +z^2 a^{-8} -z^2- a^{-2} +2 a^{-4} - a^{-6} +1 }[/math]