Data:10 105/HOMFLYPT Polynomial

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