Data:K11a79/HOMFLYPT Polynomial

$- a 2 z 8 + 2 a 4 z 6 -5 a 2 z 6 + z 6 - a 6 z 4 + 7 a 4 z 4 -10 a 2 z 4 + 3 z 4 -2 a 6 z 2 + 8 a 4 z 2 -9 a 2 z 2 + 3 z 2 - a 6 + 3 a 4 -3 a 2 + 2$