Data:L10a19/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)-a^7 z^{-1} +2 a^5 z^3+3 a^5 z+2 a^5 z^{-1} -a^3 z^5-a^3 z^3-a z^5-2 a z^3+z^3 a^{-1} -3 a z-a z^{-1} +z a^{-1} }