Data:K12n815/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^6}{a^2}+ $Failed^{-1} +z^6-a^2 z^4-6 z^4}{a^2}+ $Failed^{-1} +z^4}{a^4}+ $Failed^{-1} +5 z^4-2 a^2 z^2-10 z^2}{a^2}+ $Failed^{-1} +3 z^2}{a^4}+ $Failed^{-1} +7 z^2-4}{a^2}+ $Failed^{-1} +2}{a^4}+ $Failed^{-1} +3}