Data:L11a503/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 a^4 z^6+4 a^4 z^4+6 a^4 z^2+2 a^4 z^{-2} +5 a^4-a^2 z^8-6 a^2 z^6-15 a^2 z^4-z^4 a^{-2} -21 a^2 z^2-4 z^2 a^{-2} -5 a^2 z^{-2} - a^{-2} z^{-2} -16 a^2-4 a^{-2} +2 z^6+10 z^4+18 z^2+4 z^{-2} +15}