Data:K11n172/HOMFLYPT Polynomial

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