Data:10 8/HOMFLYPT Polynomial

$z^4 a^6+3 z^2 a^6+a^6-z^6 a^4-4 z^4 a^4-3 z^2 a^4-z^6 a^2-5 z^4 a^2-7 z^2 a^2-3 a^2+z^4+4 z^2+3$