Data:L11a221/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)+2 a^5 z^3+a^5 z-a^3 z^5+a^3 z^{-1} -z a^{-3} -a z^5+2 z^3 a^{-1} -a z-a z^{-1} +z a^{-1} }