Data:K12n195/HOMFLYPT Polynomial

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