Data:L11n109/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^{13} z^{-1} +2 z a^{11}+2 a^{11} z^{-1} +z a^9-a^9 z^{-1} -z^5 a^7-4 z^3 a^7-2 z a^7+a^7 z^{-1} -z^5 a^5-4 z^3 a^5-3 z a^5-a^5 z^{-1} }