Data:K11n128/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^4-2 z^4 a^{-2} +4 z^4-2 a^2 z^2-5 z^2 a^{-2} +z^2 a^{-4} +5 z^2-2 a^{-2} + a^{-4} +2}