Data:K12a1049/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+2 a^4 z^6-3 a^2 z^6+2 z^6-a^6 z^4+5 a^4 z^4-a^2 z^4-z^4 a^{-2} +5 z^4-2 a^6 z^2+a^4 z^2+4 a^2 z^2-2 z^2 a^{-2} +z^2-2 a^4+4 a^2-1}