Data:L7n1/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^9 z^{-1} +a^7 z^3+4 a^7 z+3 a^7 z^{-1} -a^5 z^5-5 a^5 z^3-6 a^5 z-2 a^5 z^{-1} }