mtight coloredeq eqq" style=""><span class="mopen mtight" style="">(</span><span class="mord mathnormal mtight" style="">i</span><span class="mclose mtight" style="">)</span></span></span></span></span></span></span></span></span></span><span class="mord"><span class="delimsizing size2">)</span></span><span class="mspace" style="margin-right:0.2222222222222222em;"></span><span class="mbin">+</span><span class="mspace" style="margin-right:0.2222222222222222em;"></span></span><span class="base"><span class="s