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Annotation of 43BSDTahoe/usr.lib/learn/eqn/L7.1c, revision 1.1

1.1     ! root        1: #once #create message
        !             2: .ND
        !             3: .tr %$
        !             4: .EQ
        !             5: delim $$
        !             6: .EN
        !             7: .LP
        !             8: It is also quite permissible to leave out
        !             9: either the "from" part or the "to" part
        !            10: of a from-to construction.  For example,
        !            11: modify "Example" so its output looks like this,
        !            12: then type "ready".
        !            13: .pl 1
        !            14: #once #create Ref
        !            15: .LP
        !            16: .EQ
        !            17: lim from {x-> pi /2} ( tan~x) sup {sin~2x}~=~1
        !            18: .EN
        !            19: .pl 1
        !            20: #once #create Example
        !            21: .LP
        !            22: .EQ
        !            23: lim from xxx ( tan~x) sup {sin~2x}~=~1
        !            24: .EN
        !            25: .pl 1
        !            26: #
        !            27: #once neqn Ref | nroff >X1 &
        !            28: #once neqn message Ref | nroff -T$term %s/tinyms -
        !            29: #user
        !            30: neqn Example | nroff >X2
        !            31: #cmp X1 X2
        !            32: #log
        !            33: #next
        !            34: 7.1d 10
        !            35: 7.2c 5

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