Data:K11a37/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^2 z^4-3 z^4 a^{-2} +2 z^4 a^{-4} -3 z^4+2 a^2 z^2-5 z^2 a^{-2} +5 z^2 a^{-4} -z^2 a^{-6} -4 z^2+2 a^2-3 a^{-2} +4 a^{-4} - a^{-6} -1}