Data:K12n883/HOMFLYPT Polynomial

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