Data:K12n842/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^8-a^2 z^6-2 z^6}{a^2}+ $Failed^{-1} +4 z^6-3 a^2 z^4-5 z^4}{a^2}+ $Failed^{-1} +z^4}{a^4}+ $Failed^{-1} +6 z^4+a^4 z^2-4 a^2 z^2-3 z^2}{a^2}+ $Failed^{-1} +z^2}{a^4}+ $Failed^{-1} +4 z^2+a^4-2 a^2+2}