Data:K11a218/HOMFLYPT Polynomial

[math]\displaystyle{ -a^8+3 z^2 a^6+2 a^6-3 z^4 a^4-3 z^2 a^4-a^4+z^6 a^2+z^4 a^2+z^2 a^2-2 z^4-z^2+1+z^2 a^{-2} }[/math]