<<< native [ EDelimited "(" ")" [ Right (EGrouped [ EIdentifier "a" , ESymbol Bin "+" , EIdentifier "b" ]) ] , ESymbol Bin "+" , EDelimited "(" ")" [ Right (EFraction NormalFrac (ENumber "1") (ENumber "2")) ] ] >>> mml $$\left(a+b\right)+\left(\frac{1}{2}\right)$$