Data:K12n817/HOMFLYPT Polynomial

Failed to parse (syntax error): {\displaystyle -z^6}{a^2}- $Failed^{-1} -z^6+a^2 z^4-4 z^4}{a^2}+ $Failed^{-1} +z^4}{a^4}- $Failed^{-1} -4 z^4+3 a^2 z^2-5 z^2}{a^2}+ $Failed^{-1} +3 z^2}{a^4}- $Failed^{-1} -5 z^2+2 a^2-2}{a^2}+ $Failed^{-1} +2}{a^4}- $Failed^{-1} -1}