Data:L10a1/HOMFLYPT Polynomial

$a z^7-2 a^3 z^5+4 a z^5-z^5 a^{-1} +a^5 z^3-4 a^3 z^3+6 a z^3-2 z^3 a^{-1} +a z-z a^{-1} -a^5 z^{-1} +3 a^3 z^{-1} -2 a z^{-1}$