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Annotation of 42BSD/usr.lib/learn/eqn/L2.1f, revision 1.1

1.1     ! root        1: #once #create message
        !             2: .ND
        !             3: .LP
        !             4: One of the most common problems in using neqn is forgetting
        !             5: to leave spaces or tildes around "magic" words like "pi"
        !             6: or "int" or "sum".  The result is that the magic words
        !             7: cease to be magic, and just look like ordinary strings
        !             8: of letters.
        !             9: 
        !            10: In the file "Example", there are several such errors.
        !            11: Find them, and fix them so the output looks
        !            12: like this, then type "ready".
        !            13: .pl 1
        !            14: #once #create Ref
        !            15: .LP
        !            16: .EQ
        !            17: sum ~=~ pi ~+~1
        !            18: .EN
        !            19: .EQ
        !            20: a~=~ pi (x)
        !            21: .EN
        !            22: .EQ
        !            23: alpha ~=~ beta ~+~ gamma ~+~ delta
        !            24: .EN
        !            25: .pl 1
        !            26: #once #create Example
        !            27: .LP
        !            28: .EQ
        !            29: sum=pi+1
        !            30: .EN
        !            31: .EQ
        !            32: a=pi(x)
        !            33: .EN
        !            34: .EQ
        !            35: alpha=beta+gamma+delta
        !            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: 3.1a 10

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