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BSD 4.3reno

#once #create message
.ND
.tr %$
.EQ
delim $$
.EN
.LP
Let's do one more example of from-to for practice
before we go on to the next topic.
Modify "Example" so it produces output that looks
like this, then type "ready".
.pl 1
#once #create Ref
.EQ
delim $$
.EN
.LP
Let $Q( pi )$ be $sum from {i= pi sub 1} to {i= pi sub 2} x sub i$.
.pl 1
#once #create Example
.EQ
delim $$
.EN
.LP
Let $Q( pi )$ be $sum from {i= pi sub 1} to xxxx x sub i$.
.pl 1
#
#once neqn Ref | nroff >X1 &
#once neqn message Ref | nroff -T$term %s/tinyms -
#user
neqn Example | nroff >X2
#cmp X1 X2
#fail
Don't forget to set delimiters before the .LP line,
and get the spaces right around the dollar signs.
#log
#next
8.1a 10

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