="n">f</span><span class="p">),</span><span class="w"> </span><span class="ow">and</span><span class="w"> </span><span class="n">DBLE</span><span class="p">(</span><span class="mi">3</span><span class="n">f</span><span class="p">)</span><span class="w"> </span><span class="n">are</span><span class="w"> </span><span class="n">also</span><span class="w"> </span><span class="n">extended</span><span class="w"></span>
<span class="n">to</span><span class="w"> </span><span class="n">take</span><span class="w"> </