Data:L10a2/HOMFLYPT Polynomial

$- z 3 a 7 - z a 7 + 2 z 5 a 5 + 5 z 3 a 5 + 2 z a 5 - a 5 z -1 - z 7 a 3 -4 z 5 a 3 -5 z 3 a 3 + 3 a 3 z -1 + z 5 a + 2 z 3 a - z a -2 a z -1$