Data:9 17/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-a^4 z^4+4 a^2 z^4-2 z^4-2 a^4 z^2+5 a^2 z^2+z^2 a^{-2} -6 z^2+2 a^2+2 a^{-2} -3}