> <span class="s2">&quot;ela&quot;</span>
<span class="n">long</span> <span class="o">=</span> <span class="n">pd</span><span class="o">.</span><span class="n">concat</span><span class="p">([</span><span class="n">math</span><span class="p">,</span> <span class="n">ela</span><span class="p">])</span>
<span class="n">long</span>
</pre></div>
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