Data:K11a93/HOMFLYPT Polynomial

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