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Annotation of 42BSD/usr.lib/learn/eqn/L7.1d, revision 1.1.1.1

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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