Data:9 26/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^6 a^{-2} +4 z^4 a^{-2} -2 z^4 a^{-4} -z^4+6 z^2 a^{-2} -5 z^2 a^{-4} +z^2 a^{-6} -2 z^2+3 a^{-2} -3 a^{-4} + a^{-6} }