Data:K12n837/HOMFLYPT Polynomial

Failed to parse (syntax error): {\displaystyle z^8-2 a^2 z^6-z^6}{a^2}+ $Failed^{-1} +4 z^6+a^4 z^4-4 a^2 z^4-3 z^4}{a^2}+ $Failed^{-1} +5 z^4+2 a^2 z^2-2 z^2}{a^2}+ $Failed^{-1} +z^2}{a^4}+ $Failed^{-1} +z^2-2 a^4+4 a^2-1}