<<< mml ${\displaystyle \sqrt[\frac{x}{3}]{x-\frac{x}{3}}}+\sqrt[\frac{x}{3}]{x-3}+\sqrt[\frac{x}{3}]{x-3}+{\displaystyle \frac{x}{3}}$ >>> native [ ERoot (EFraction NormalFrac (EIdentifier "x") (ENumber "3")) (EGrouped [ EIdentifier "x" , ESymbol Bin "-" , EFraction NormalFrac (EIdentifier "x") (ENumber "3") ]) , ESymbol Bin "+" , ERoot (EFraction NormalFrac (EIdentifier "x") (ENumber "3")) (EGrouped [ EIdentifier "x" , ESymbol Bin "-" , ENumber "3" ]) , ESymbol Bin "+" , ERoot (EFraction NormalFrac (EIdentifier "x") (ENumber "3")) (EGrouped [ EIdentifier "x" , ESymbol Bin "-" , ENumber "3" ]) , ESymbol Bin "+" , EFraction NormalFrac (EIdentifier "x") (ENumber "3") ]