Data:9 25/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+3 a^6-2 z^4 a^4-4 z^2 a^4-3 a^4-z^4 a^2+a^2+z^2+1}