Data:K12n845/HOMFLYPT Polynomial

Failed to parse (syntax error): {\displaystyle 2 z^6}{a^2}+ $Failed^{-1} +z^6-a^2 z^4+7 z^4}{a^2}- $Failed^{-1} -2 z^4}{a^4}+ $Failed^{-1} +2 z^4-2 a^2 z^2+7 z^2}{a^2}- $Failed^{-1} -4 z^2}{a^4}+ $Failed^{-1} +2}{a^2}- $Failed^{-1} -1}{a^4} $Failed^{-1} }