Data:K12a1053/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+4 a^2 z^6-z^6 a^{-2} +4 z^6-3 a^4 z^4+7 a^2 z^4-3 z^4 a^{-2} +6 z^4-4 a^4 z^2+7 a^2 z^2-3 z^2 a^{-2} +2 z^2-2 a^4+4 a^2-1}