><span class="o">**</span><span class="mi">2</span><span class="o">/</span><span class="p">(</span><span class="mi">2</span><span class="o">*</span><span class="n">sigR</span><span class="o">**</span><span class="mi">2</span><span class="p">)</span><span class="o">+</span> <span class="p">&amp;</span>
       <span class="p">(</span><span class="nb">sin</span><span class="p">(</span><span class="n">theta</span><span class="p">))</span><span class="o">**</span><span class="mi">2</span><span class="o">/</span>