Data:K11n51/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} -5 z^4 a^{-2} +2 z^4 a^{-4} +z^4-8 z^2 a^{-2} +7 z^2 a^{-4} -z^2 a^{-6} +3 z^2-4 a^{-2} +5 a^{-4} -2 a^{-6} +2}