Data:L11n180/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} -a^5 z-a^5 z^{-1} -a^3 z^3-3 a^3 z+a z^5+4 a z^3-z^3 a^{-1} +3 a z-2 z a^{-1} }