Data:K11n66/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} +3 z^4 a^{-2} -3 z^4 a^{-4} -z^4+5 z^2 a^{-2} -7 z^2 a^{-4} +2 z^2 a^{-6} -z^2+4 a^{-2} -5 a^{-4} +2 a^{-6} }