Data:K11n50/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^2 a^6-a^6+z^4 a^4+2 z^2 a^4+a^4+z^4 a^2+2 z^2 a^2+a^2-z^2}