Data:K12a1022/HOMFLYPT Polynomial

Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle z^6 a^{-2} +2 z^6 a^{-4} +3 z^4 a^{-4} -5 z^4 a^{-6} -z^4+3 z^2 a^{-4} -6 z^2 a^{-6} +4 z^2 a^{-8} - a^{-6} +2 a^{-8} - a^{-10} +1}