Data:K11a218/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^8+3 z^2 a^6+2 a^6-3 z^4 a^4-3 z^2 a^4-a^4+z^6 a^2+z^4 a^2+z^2 a^2-2 z^4-z^2+1+z^2 a^{-2} }