Data:L11a81/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)-a^{13} z^{-1} +3 a^{11} z^3+4 a^{11} z+a^{11} z^{-1} -2 a^9 z^5-a^9 z^3+4 a^9 z+2 a^9 z^{-1} -4 a^7 z^5-11 a^7 z^3-9 a^7 z-2 a^7 z^{-1} -a^5 z^5-a^5 z^3}