Data:K15a77226/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^4+18 t^3-61 t^2+114 t-137+114 t^{-1} -61 t^{-2} +18 t^{-3} -2 t^{-4} }