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Annotation of 42BSD/usr.lib/learn/eqn/L3.1c, revision 1.1

1.1     ! root        1: #once #create message
        !             2: .ND
        !             3: .PP
        !             4: Subscripts and superscripts can appear in the same equation,
        !             5: and any subscripted or superscripted thing can have
        !             6: a subscript or superscript.
        !             7: For example, you can say
        !             8: 
        !             9:    .EQ
        !            10:    x sub i sub j ~+~ y sup i sup j
        !            11:    .EN
        !            12: 
        !            13: to get
        !            14: .EQ
        !            15: x sub i sub j ~+~ y sup i sup j
        !            16: .EN
        !            17: Modify "Example" to produce the following output, then type "ready".
        !            18: .pl 1
        !            19: #once #create Ref
        !            20: .LP
        !            21: .EQ
        !            22: 2 sup 2 sup 2 sup 2 ~=~ 65536
        !            23: .EN
        !            24: .pl 1
        !            25: #once #create Example
        !            26: .LP
        !            27: .EQ
        !            28: xxx
        !            29: .EN
        !            30: .pl 1
        !            31: #
        !            32: #once neqn Ref | nroff >X1 &
        !            33: #once neqn message Ref | nroff -T$term %s/tinyms -
        !            34: #user
        !            35: neqn Example | nroff >X2
        !            36: #cmp X1 X2
        !            37: #log
        !            38: #next
        !            39: 3.1d 10
        !            40: 3.2c 5

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