Data:K12a1086/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^4 a^6-z^2 a^6-a^6+z^6 a^4+z^4 a^4+z^2 a^4+a^4+2 z^6 a^2+4 z^4 a^2+3 z^2 a^2+a^2+z^6+z^4-z^4 a^{-2} -z^2 a^{-2} }