                 BAR&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;
                   FOO&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;   &quot;a d - b c&quot;
(%o4)              &quot;sin(%pi x)&quot; + &quot;---------&quot;
                   &quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;   &quot;    2    &quot;
                                  &quot;   h     &quot;
                                  &quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;
(%i