Data:K11a261/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^4 a^8+2 z^2 a^8+a^8-2 z^6 a^6-7 z^4 a^6-7 z^2 a^6-2 a^6+z^8 a^4+5 z^6 a^4+9 z^4 a^4+6 z^2 a^4-z^6 a^2-3 z^4 a^2-z^2 a^2+2 a^2}