Data:K12a1121/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^2 z^8+z^8-a^4 z^6+5 a^2 z^6-z^6 a^{-2} +4 z^6-4 a^4 z^4+10 a^2 z^4-3 z^4 a^{-2} +5 z^4-5 a^4 z^2+9 a^2 z^2-3 z^2 a^{-2} +2 z^2-2 a^4+3 a^2- a^{-2} +1}