Data:L9a11/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^7 z^{-1} -3 a^5 z-2 a^5 z^{-1} +3 a^3 z^3+4 a^3 z+2 a^3 z^{-1} -a z^5-2 a z^3+z^3 a^{-1} -3 a z-a z^{-1} }