Data:K12n838/HOMFLYPT Polynomial

Failed to parse (syntax error): {\displaystyle z^4}{a^4}- $Failed^{-1} -2 z^2}{a^2}+ $Failed^{-1} +2 z^2}{a^4}- $Failed^{-1} -2 z^2}{a^6}- $Failed^{-1} -2}{a^2}+ $Failed^{-1} +2}{a^4}- $Failed^{-1} -2}{a^6}+ $Failed^{-1} +1}{a^8}+ $Failed^{-1} +2}