ss="keyword">return</span> <span class="identifier">exp</span><span class="special">(-</span><span class="identifier">x</span><span class="special">)</span> <span class="special">*</span> <span class="identifier">pow</span><span class="special">(</span><span class="identifier">tan</span><span class="special">(</span><span class="identifier">exp</span><span class="special">(-</span><span class="identifier">x</span><span class="special">)),</span> <span class="special">-</span><span class="identifier">p</span