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