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

1.1     ! root        1: #once #create message
        !             2: .ND
        !             3: .EQ
        !             4: delim $$
        !             5: .EN
        !             6: .LP
        !             7: So far we have carefuly skirted around a potential
        !             8: problem; maybe you've wondered about it.
        !             9: Suppose we want to produce an equation that looks
        !            10: like this:
        !            11: .EQ
        !            12: x sup { pi + 1 }
        !            13: .EN
        !            14: The superscript is complicated, in that it contains
        !            15: both a $pi$ and a +1, which has to be separated
        !            16: from the $pi$ by a blank.
        !            17: But I already told you that a blank terminates
        !            18: the superscript.  What's going on?
        !            19: 
        !            20: As the first step to finding out, will the input
        !            21: equation
        !            22: 
        !            23:   x sup pi + 1
        !            24: 
        !            25: produce the output
        !            26: 
        !            27:   $x sup {pi + 1}$ ?
        !            28: Answer yes or no.
        !            29: (You can play with the file "Example" if you like.)
        !            30: .pl 1
        !            31: #once #create Example
        !            32: .LP
        !            33: .EQ
        !            34: replace me
        !            35: .EN
        !            36: .pl 1
        !            37: #
        !            38: #once neqn message | nroff -T$term %s/tinyms -
        !            39: #copyin
        !            40: #user
        !            41: #uncopyin
        !            42: #match no
        !            43: #log
        !            44: #next
        !            45: 5.1b

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