Data:L10a13/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} +3 a^5 z^3+6 a^5 z+4 a^5 z^{-1} -2 a^3 z^5-6 a^3 z^3-8 a^3 z-4 a^3 z^{-1} -a z^5-a z^3+z^3 a^{-1} +a z^{-1} +z a^{-1} }