Data:10 29/HOMFLYPT Polynomial

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