<<< native
[ EGrouped [ ESymbol Op "\8747" , EIdentifier "x" ]
, EGrouped [ ESymbol Op "\8747" , EIdentifier "M" ]
, EDelimited
    "\8747"
    ""
    [ Right (EFraction NormalFrac (EIdentifier "x") (EIdentifier "o"))
    ]
, EDelimited
    "\8747"
    ""
    [ Right (EFraction NormalFrac (EIdentifier "A") (EIdentifier "o"))
    ]
, EDelimited
    "\8747"
    ""
    [ Right (EFraction NormalFrac (EIdentifier "x") (EIdentifier "A"))
    ]
, EDelimited
    "\8747"
    ""
    [ Right (EFraction NormalFrac (EIdentifier "A") (EIdentifier "M"))
    ]
, EDelimited
    "\8747"
    ""
    [ Right (EFraction NormalFrac (EIdentifier ".") (EIdentifier "''"))
    ]
]
>>> eqn
{int x} {int M} left ∫ x over o right "" left ∫ A over o right "" left ∫ x over A right "" left ∫ A over M right "" left ∫ . over '' right ""