texmath-0.7: tests/readers/mml/stretchVertNest2.native
[EDelimited "(" ")" [Right (EDelimited "(" ")" [Right (EFraction NormalFrac (EIdentifier "x") (EIdentifier "y"))])]]
[EDelimited "(" ")" [Right (EDelimited "(" ")" [Right (EFraction NormalFrac (EIdentifier "x") (EIdentifier "y"))])]]