Data:K11a285/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^2 z^6-z^6+a^4 z^4-a^2 z^4+2 z^4 a^{-2} -a^2 z^2+z^2 a^{-2} -z^2 a^{-4} +z^2+1}