Data:K11a349/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} +z^6 a^{-4} +z^4 a^{-2} -2 z^4 a^{-6} -z^4+z^2 a^{-2} -2 z^2 a^{-4} -z^2 a^{-6} +z^2 a^{-8} + a^{-2} -2 a^{-4} + a^{-6} +1}