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Annotation of 43BSD/usr.lib/learn/eqn/L5.1b, revision 1.1

1.1     ! root        1: #once #create message
        !             2: .ND
        !             3: .EQ
        !             4: delim $$
        !             5: .EN
        !             6: .LP
        !             7: The problem is really that we need a way to tell neqn
        !             8: that in spite of blanks, a group of things (like the $pi$
        !             9: and the +1) have to be kept together as a single superscript.
        !            10: The way that this is done is to enclose the group in
        !            11: braces - the characters { and } - like this:
        !            12: 
        !            13:   .EQ
        !            14:   x sup {pi + 1}
        !            15:   .EN
        !            16: 
        !            17: This tells neqn that everything inside the braces belongs
        !            18: to the superscript, in spite of blanks and tildes.
        !            19: (You don't need blanks before and after braces themselves -
        !            20: like tildes, they act as delimiters.)
        !            21: 
        !            22: Modify the file "Example" so that the output looks like
        !            23: the following, then type "ready".
        !            24: (To get $==$, type ==.)
        !            25: .pl 1
        !            26: #once #create Ref
        !            27: .LP
        !            28: .EQ
        !            29: x sup {pi +1} == y sup z sup {alpha + beta}
        !            30: .EN
        !            31: .pl 1
        !            32: #once #create Example
        !            33: .LP
        !            34: .EQ
        !            35: replace me
        !            36: .EN
        !            37: .pl 1
        !            38: #
        !            39: #once neqn Ref | nroff >X1 &
        !            40: #once neqn message Ref | nroff -T$term %s/tinyms -
        !            41: #user
        !            42: neqn Example | nroff >X2
        !            43: #cmp X1 X2
        !            44: #log
        !            45: #next
        !            46: 5.1c 10
        !            47: 5.2b 5

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