span><span class="op">(</span><span class="fu">exdex</span><span class="fu">::</span><span class="va"><a href="https://paulnorthrop.github.io/exdex/reference/cheeseboro.html" class="external-link">cheeseboro</a></span><span class="op">)</span>, u <span class="op">=</span> <span class="fl">45</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/utils/head.html" class="external-link">head</a></span><span class="op">(</span><span class="fu">estfun</