/span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<p>Therefore, the function that we want to integrate is:</p>
<div class="sourceCode" id="cb6"><pre class="sourceCode stan code-with-copy"><code class="sourceCode stan"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a><span class="dt">real</span> integrand(<span class="dt">real</span> x,</span>
<span id="cb6-2"><a href="#cb6-2" aria-hidden="true" tabindex="-1"></a>            