Data:K12n818/HOMFLYPT Polynomial

Failed to parse (syntax error): {\displaystyle z^6}{a^2}+ $Failed^{-1} +2 z^4}{a^2}- $Failed^{-1} -2 z^4}{a^4}- $Failed^{-1} -3 z^4+2 a^2 z^2+2 z^2}{a^2}- $Failed^{-1} -3 z^2}{a^4}+ $Failed^{-1} +z^2}{a^6}- $Failed^{-1} -7 z^2+3 a^2+2}{a^2}- $Failed^{-1} -1}{a^4}+ $Failed^{-1} +1}{a^6}- $Failed^{-1} -4}