Data:K12n865/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^8+a^4 z^6-6 a^2 z^6+z^6+4 a^4 z^4-14 a^2 z^4+3 z^4+6 a^4 z^2-13 a^2 z^2+z^2}{a^2}+ $Failed^{-1} +3 z^2+2 a^4-3 a^2+1}{a^2}+ $Failed^{-1} +1}