Data:K12a1040/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^3-13 t^2+27 t-31+27 t^{-1} -13 t^{-2} +2 t^{-3} }