Data:9 45/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+2 z^2 a^6+2 a^6-z^4 a^4-2 z^2 a^4-2 a^4+2 z^2 a^2+2 a^2}