Data:K12n809/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^4}- $Failed^{-1} -7 z^4}{a^2}+ $Failed^{-1} +5 z^4}{a^4}- $Failed^{-1} -z^4}{a^6}+ $Failed^{-1} +z^4-13 z^2}{a^2}+ $Failed^{-1} +8 z^2}{a^4}- $Failed^{-1} -3 z^2}{a^6}+ $Failed^{-1} +4 z^2-6}{a^2}+ $Failed^{-1} +4}{a^4}- $Failed^{-1} -2}{a^6}+ $Failed^{-1} +1}{a^8}+ $Failed^{-1} +4}