Data:T(13,2)/HOMFLYPT Polynomial

$z^{12}a^{-12}+12z^{10}a^{-12}-z^{10}a^{-14}+55z^{8}a^{-12}-10z^{8}a^{-14}+120z^{6}a^{-12}-36z^{6}a^{-14}+126z^{4}a^{-12}-56z^{4}a^{-14}+56z^{2}a^{-12}-35z^{2}a^{-14}+7a^{-12}-6a^{-14}$