Data:K12n855/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^6-2 z^6+a^4 z^4-3 a^2 z^4+2 z^4}{a^2}- $Failed^{-1} -8 z^4+3 a^4 z^2-3 a^2 z^2+5 z^2}{a^2}- $Failed^{-1} -10 z^2+2 a^4-a^2+3}{a^2}- $Failed^{-1} -3}