Data:L11a72/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} \left(-z^3\right)-4 a^{13} z-3 a^{13} z^{-1} +3 a^{11} z^5+14 a^{11} z^3+19 a^{11} z+7 a^{11} z^{-1} -2 a^9 z^7-11 a^9 z^5-20 a^9 z^3-15 a^9 z-4 a^9 z^{-1} -a^7 z^7-5 a^7 z^5-7 a^7 z^3-2 a^7 z}