Data:L11n378/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 -z^2 a^6-a^6 z^{-2} -2 a^6+z^4 a^4+4 z^2 a^4+4 a^4 z^{-2} +7 a^4-3 z^2 a^2-5 a^2 z^{-2} -8 a^2+2 z^{-2} +3}