Data:10 51/Alexander 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 2 t^3-7 t^2+15 t-19+15 t^{-1} -7 t^{-2} +2 t^{-3} }