</span> 1 "0"                       </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 2 "(1/28)c"                 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 3 "(1/56)b+(3/28)c"         </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 4 "(1/70)a+(1/14)b+(3/14)c" </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 5 "(1/14)a+(5/28)b+(5/14)c" </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 6 "(3/14)a+(5/14)b+(15/28)c"</span>
<span class="