Data:9 13/HOMFLYPT Polynomial

Failed to parse (syntax error): {\displaystyle z^4 a^{-4} +2 z^4 a^{-6} +z^4 a^{-8} +2 z^2 a^{-4} +5 z^2 a^{-6} +z^2 a^{-8} -z^2 a^{-10} }+3 a^{-6} - a^{-8} - a^{-10} }}