Data:K12a1129/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+6 a^2 z^6-z^6 a^{-2} +5 z^6-5 a^4 z^4+13 a^2 z^4-4 z^4 a^{-2} +7 z^4-7 a^4 z^2+12 a^2 z^2-4 z^2 a^{-2} +z^2-2 a^4+4 a^2-1}