<<< native [ EDelimited "(" ")" [ Right (EGrouped [ EIdentifier "a" , ESymbol Bin "+" , EIdentifier "b" ]) ] , ESymbol Rel "=" , EDelimited "(" ")" [ Right (EFraction NormalFrac (EIdentifier "\945") (EIdentifier "\946")) ] , ESymbol Rel "=" , EDelimited "[" ")" [ Right (EGrouped [ EIdentifier "a" , ESymbol Bin "+" , EIdentifier "b" ]) ] ] >>> mml $$\left(a+b\right)=\left(\frac{\alpha }{\beta }\right)=\left[a+b\right)$$