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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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