Data:L8a3/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 z a^5-2 a^5 z^{-1} +2 z^3 a^3+3 z a^3+2 a^3 z^{-1} +z^3 a-z a-a z^{-1} -z a^{-1} }