Data:L10a140/HOMFLYPT Polynomial

$-a^2 z^6-z^6 a^{-2} -4 a^2 z^4-4 z^4 a^{-2} -4 a^2 z^2-4 z^2 a^{-2} +a^2 z^{-2} + a^{-2} z^{-2} +z^8+6 z^6+12 z^4+8 z^2-2 z^{-2}$