Data:K12n868/HOMFLYPT Polynomial

Failed to parse (syntax error): {\displaystyle -z^6}{a^2}+ $Failed^{-1} +z^6-a^2 z^4-5 z^4}{a^2}+ $Failed^{-1} +z^4}{a^4}+ $Failed^{-1} +7 z^4-4 a^2 z^2-10 z^2}{a^2}+ $Failed^{-1} +2 z^2}{a^4}+ $Failed^{-1} +12 z^2-2 a^2-6}{a^2}+ $Failed^{-1} +2}{a^4}+ $Failed^{-1} +7}