Data:K11a280/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^6-3 z^2 a^4-a^4+2 z^4 a^2-a^2+3 z^4+3 z^2+2+z^4 a^{-2} -z^2 a^{-2} -z^2 a^{-4} }