pan> <span class="n">Ct</span> <span class="o">-</span> <span class="n">Cr</span>
            <span class="n">dH</span> <span class="o">=</span> <span class="n">ht</span> <span class="o">-</span> <span class="n">hr</span>
            <span class="n">DEab2</span> <span class="o">=</span> <span class="p">((</span><span class="n">at</span><span class="o">-</span><span class="n">ar</span><span class="p">)</span><span class="o">**</span><span class="mi">2</span> <span class="o">+</span> <span class="p">(</span><