Data:K12n844/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^6-z^4 a^4-3 z^2 a^4+z^6 a^2+2 z^4 a^2-3 z^2 a^2-3 a^2+2 z^6+8 z^4+9 z^2+5-3 z^4}{a^2}- $Failed^{-1} -9 z^2}{a^2}- $Failed^{-1} -4}{a^2}+ $Failed^{-1} +z^2}{a^4}+ $Failed^{-1} +2}{a^4} $Failed^{-1} }