Data:7 3/Kauffman Polynomial

Failed to parse (syntax error): {\displaystyle z^6 a^{-6} +z^6 a^{-8} +z^5 a^{-5} +2 z^5 a^{-7} +z^5 a^{-9} +z^4 a^{-4} -3 z^4 a^{-6} -3 z^4 a^{-8} +z^4 a^{-10} }-2 z^3 a^{-5} -4 z^3 a^{-7} -z^3 a^{-9} +z^3 a^{-11} }-3 z^2 a^{-4} +4 z^2 a^{-6} +6 z^2 a^{-8} -z^2 a^{-10} }+3 z a^{-7} +z a^{-9} -2 z a^{-11} }+ a^{-4} -2 a^{-6} -2 a^{-8} }