al">(</span><span class="number">2</span>
                    <span class="special">-</span> <span class="identifier">p</span><span class="special">)</span> <span class="special">/</span>
                    <span class="identifier">sqrt</span><span class="special">(</span><span class="identifier">r</span> <span class="special">*</span>
                    <span class="special">(</span><span class="number">1</span>
                    <span class="special">-</span> <span class="identifier">p</span><span cla