>add</span><span class="p" data-group-id="9512692941-9">(</span><span class="p" data-group-id="9512692941-10">{</span><span class="mi">2</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="o">-</span><span class="mi">2</span><span class="p" data-group-id="9512692941-10">}</span><span class="p">,</span><span class="w"> </span><span class="nc">Vector</span><span class="o">.</span><span class="n">reverse</span><span class="