Data:10 42/HOMFLYPT Polynomial

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