><span class="w"> </span><span class="n">j</span><span class="o">/=</span><span class="n">Nu</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="nb">sum</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">sum</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">z</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="o">*</span><span class="n">z</spa