Data:K11a112/HOMFLYPT Polynomial

$z 8 -2 a 2 z 6 - z 6 a -2 + 5 z 6 + a 4 z 4 -8 a 2 z 4 -3 z 4 a -2 + 9 z 4 + 3 a 4 z 2 -10 a 2 z 2 -2 z 2 a -2 + 6 z 2 + 2 a 4 -3 a 2 + a -2 + 1$