Data:K12n805/HOMFLYPT Polynomial

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