Data:K12a1021/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^8 a^{-2} -3 z^6 a^{-2} +3 z^6 a^{-4} +z^6-5 z^4 a^{-2} +6 z^4 a^{-4} -3 z^4 a^{-6} +z^4-3 z^2 a^{-2} +5 z^2 a^{-4} -3 z^2 a^{-6} +z^2 a^{-8} +z^2- a^{-2} +2 a^{-4} - a^{-6} +1}