Data:K11a57/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+a^4 z^6-6 a^2 z^6+2 z^6+4 a^4 z^4-15 a^2 z^4-z^4 a^{-2} +10 z^4+6 a^4 z^2-19 a^2 z^2-4 z^2 a^{-2} +18 z^2+3 a^4-10 a^2-4 a^{-2} +12}