Data:10 19/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^2 z^6+z^6-a^4 z^4+3 a^2 z^4-z^4 a^{-2} +4 z^4-2 a^4 z^2+a^2 z^2-3 z^2 a^{-2} +5 z^2-a^2- a^{-2} +3}