Data:K11a59/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^4+a^4-z^4 a^2-2 z^2 a^2-a^2-z^4-z^2-z^4 a^{-2} -z^2 a^{-2} +2 z^2 a^{-4} +2 a^{-4} - a^{-6} }