<<< native [ ESymbol Op "\8747" , EIdentifier "f" , EDelimited "(" ")" [ Right (EFraction NormalFrac (EIdentifier "x") (ENumber "2")) ] , ESpace (1 % 9) , ESymbol Ord "\8518" , EIdentifier "x" ] >>> mml $$\int f\left(\frac{x}{2}\right)dx$$