Data:K11n6/HOMFLYPT Polynomial

[math]\displaystyle{ -z^2 a^6-2 a^6+2 z^4 a^4+7 z^2 a^4+5 a^4-z^6 a^2-5 z^4 a^2-7 z^2 a^2-3 a^2+z^2 a^{-2} + a^{-2} }[/math]