Data:10 86/HOMFLYPT Polynomial

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