Data:K11n8/HOMFLYPT Polynomial

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