><span class="o">-</span><span class="mi">1</span><span class="p">,</span><span class="n">j</span><span class="p">)</span><span class="o">+</span><span class="n">f</span><span class="p">(</span><span class="n">m</span><span class="p">,</span><span class="n">i</span><span class="p">,</span><span class="n">j</span><span class="p">))</span>   <span class="p">&amp;</span>
      <span class="o">+</span> <span class="n">v</span><span class="p">(</span><span class="n">m</span><span class="p">,</span><span class="n