"n">cc</span><span class="p">)</span><span class="o">/</span><span class="n">Y_R</span><span class="p">(</span><span class="n">cc</span><span class="p">)</span><span class="o">+</span> <span class="p">&amp;</span>
          <span class="n">B_R</span><span class="p">(</span><span class="n">cc</span><span class="p">)</span><span class="o">*</span><span class="n">gradB_PHI</span><span class="p">(</span><span class="n">cc</span><span class="p">))</span><span class="o">/</span><span class="p">(</span><span class