Data:K11a51/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^8+3 z^2 a^6+2 a^6-3 z^4 a^4-4 z^2 a^4-2 a^4+z^6 a^2+2 z^4 a^2+4 z^2 a^2+3 a^2-2 z^4-3 z^2-2+z^2 a^{-2} + a^{-2} }