<span class="n">predictions</span><span class="p">)</span>
    <span class="n">a</span> <span class="o">=</span> <span class="n">mse</span><span class="p">(</span><span class="n">predictions</span><span class="p">,</span> <span class="n">targets</span><span class="p">)</span>
    <span class="n">b</span> <span class="o">=</span> <span class="n">mse</span><span class="p">(</span><span class="n">ref</span><span class="p">,</span> <span class="n">targets</span><span class="p">)</span>
    <span class="n">c</sp