--- parse tree ---
[ Code
    "test/typ/math/frac-00.typ"
    ( line 1 , column 2 )
    (Let
       (BasicBind (Just (Identifier "test")))
       (FuncExpr
          [ NormalParam (Identifier "x") , NormalParam (Identifier "y") ]
          (Block
             (CodeBlock
                [ If
                    [ ( Equals (Ident (Identifier "x")) (Ident (Identifier "y"))
                      , Block (Content [ Text "\9989" ])
                      )
                    , ( Literal (Boolean True)
                      , Block
                          (Content
                             [ Text "\10060"
                             , Text "("
                             , Code
                                 "test/typ/math/frac-00.typ"
                                 ( line 1 , column 47 )
                                 (FuncCall
                                    (Ident (Identifier "repr"))
                                    [ NormalArg (Ident (Identifier "x")) ])
                             , Space
                             , Text "/"
                             , Text "="
                             , Space
                             , Code
                                 "test/typ/math/frac-00.typ"
                                 ( line 1 , column 59 )
                                 (FuncCall
                                    (Ident (Identifier "repr"))
                                    [ NormalArg (Ident (Identifier "y")) ])
                             , Text ")"
                             ])
                      )
                    ]
                ]))))
, SoftBreak
, Comment
, Equation
    True
    [ Text "x"
    , Text "="
    , MFrac (Text "1") (Text "2")
    , Text "="
    , MFrac (Text "a") (MGroup Nothing Nothing [ Text "a" , Text "h" ])
    , Text "="
    , MFrac (Text "a") (Text "a")
    , Text "="
    , MFrac
        (Text "a") (MGroup Nothing Nothing [ MFrac (Text "1") (Text "2") ])
    ]
, ParBreak
]
--- evaluated ---
document(body: { text(body: [
]), 
                 math.equation(block: true, 
                               body: { text(body: [x]), 
                                       text(body: [=]), 
                                       math.frac(denom: text(body: [2]), 
                                                 num: text(body: [1])), 
                                       text(body: [=]), 
                                       math.frac(denom: { text(body: [a]), 
                                                          text(body: [h]) }, 
                                                 num: text(body: [a])), 
                                       text(body: [=]), 
                                       math.frac(denom: text(body: [a]), 
                                                 num: text(body: [a])), 
                                       text(body: [=]), 
                                       math.frac(denom: math.frac(denom: text(body: [2]), 
                                                                  num: text(body: [1])), 
                                                 num: text(body: [a])) }, 
                               numbering: none), 
                 parbreak() })