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Annotation of 42BSD/usr.lib/learn/eqn/L5.1d, revision 1.1

1.1     ! root        1: #once #create message
        !             2: .ND
        !             3: .EQ
        !             4: delim $$
        !             5: .EN
        !             6: .LP
        !             7: You will get lots of practice
        !             8: using braces as we go along.
        !             9: One thing to keep in mind is that
        !            10: braces can appear ______within braces.
        !            11: (Remember that I said that anywhere you
        !            12: could use an "x" you could put something in
        !            13: braces instead.  So to get this:
        !            14: .EQ
        !            15: e sup {x sup {pi +1} + y sup {pi +1}}
        !            16: .EN
        !            17: you can type
        !            18: 
        !            19:   e sup {x sup {pi +1} + y sup {pi +1}}
        !            20: 
        !            21: The big superscript (the one on the "e") has
        !            22: a pair of braces that take in everything.
        !            23: Then the "x" and the "y" each have braces
        !            24: to delimit their superscripts.
        !            25: Of course the braces have to go in the right
        !            26: places, or you won't get the output you
        !            27: want.
        !            28: 
        !            29: To verify that you are still following this
        !            30: lesson, modify "Example" so it looks like
        !            31: this, then type "ready".
        !            32: .pl 1
        !            33: #once #create Ref
        !            34: .LP
        !            35: .EQ
        !            36: e sup {{x sup {pi +1} + y sup {pi +1}} over 2}
        !            37: .EN
        !            38: .pl 1
        !            39: #once #create Example
        !            40: .LP
        !            41: .EQ
        !            42: e sup {x sup {pi +1} + y sup {pi +1}}
        !            43: .EN
        !            44: .pl 1
        !            45: #
        !            46: #once neqn Ref | nroff >X1 &
        !            47: #once neqn message Ref | nroff -T$term %s/tinyms -
        !            48: #user
        !            49: neqn Example | nroff >X2
        !            50: #cmp X1 X2
        !            51: #fail
        !            52: Don't forget that you need braces for the overall superscript,
        !            53: and also for the "over" part.
        !            54: #log
        !            55: #next
        !            56: 5.1e 10
        !            57: 5.2d 5

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