Data:10 159/HOMFLYPT Polynomial

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