[EGrouped [EGrouped [EArray [AlignDefault] [[[EGrouped [EIdentifier "x",ESymbol Op "+",EGrouped [EStretchy (ESymbol Open "(")],EBinary "\\frac" (ENumber "2") (ENumber "3"),EStretchy (ESymbol Close ")")]]],[[EGrouped [EIdentifier "x",ESymbol Op "+",EGrouped [EStretchy (EOver (ESymbol Open "(") (ESymbol Op "-"))],EBinary "\\frac" (ENumber "2") (ENumber "3"),EStretchy (ESymbol Close ")")]]]]]]]