Data:L11a2/HOMFLYPT Polynomial

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