Data:9 4/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^{10}-2 a^{10}+z^4 a^8+3 z^2 a^8+2 a^8+z^4 a^6+2 z^2 a^6+z^4 a^4+3 z^2 a^4+a^4}