rum</span> <span class="o">=</span> <span class="n">func</span><span class="p">(</span><span class="n">initial</span><span class="p">,</span><span class="n">tendency</span><span class="p">,</span><span class="n">dt</span><span class="p">)</span>
<span class="n">endfunction</span> <span class="n">integrate_spectrum</span>
</pre></div>

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