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Annotation of 42BSD/usr.lib/learn/eqn/L7.1d, revision 1.1

1.1     ! root        1: #once #create message
        !             2: .ND
        !             3: .tr %$
        !             4: .EQ
        !             5: delim $$
        !             6: .EN
        !             7: .LP
        !             8: Let's do one more example of from-to for practice
        !             9: before we go on to the next topic.
        !            10: Modify "Example" so it produces output that looks
        !            11: like this, then type "ready".
        !            12: .pl 1
        !            13: #once #create Ref
        !            14: .EQ
        !            15: delim $$
        !            16: .EN
        !            17: .LP
        !            18: Let $Q( pi )$ be $sum from {i= pi sub 1} to {i= pi sub 2} x sub i$.
        !            19: .pl 1
        !            20: #once #create Example
        !            21: .EQ
        !            22: delim $$
        !            23: .EN
        !            24: .LP
        !            25: Let $Q( pi )$ be $sum from {i= pi sub 1} to xxxx x sub i$.
        !            26: .pl 1
        !            27: #
        !            28: #once neqn Ref | nroff >X1 &
        !            29: #once neqn message Ref | nroff -T$term %s/tinyms -
        !            30: #user
        !            31: neqn Example | nroff >X2
        !            32: #cmp X1 X2
        !            33: #fail
        !            34: Don't forget to set delimiters before the .LP line,
        !            35: and get the spaces right around the dollar signs.
        !            36: #log
        !            37: #next
        !            38: 8.1a 10

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