Data:K12a1046/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} +z^6 a^{-4} -z^4 a^{-2} -2 z^4 a^{-6} -2 z^4+a^2 z^2-3 z^2 a^{-2} +z^2 a^{-4} -z^2 a^{-6} +z^2 a^{-8} -2 a^{-2} + a^{-4} +2}