<p>Add the&nbsp; following:</p>
<div>&nbsp;(i) &nbsp;<span class="math-editor mathquill-rendered-math">+<span class="mtable non-leaf"><span class="mtr non-leaf"><span class="mtd"><span class="roman font">7</span></span><span class="mtd"><span class="roman font">6</span></span><span class="mtd"><span class="roman font">9</span></span></span><span class="mtr non-leaf"><span class="mtd"><span class="roman font">1</span></span><span class="mtd"><span class="roman font">5</span></span><span class="mtd"><span class="roman font">8</span></span></span></span></span>&nbsp; &nbsp; &nbsp; &nbsp; (ii)&nbsp; &nbsp;<span class="math-editor mathquill-rendered-math">+<span class="mtable non-leaf"><span class="mtr non-leaf"><span class="mtd"><span class="roman font">3</span></span><span class="mtd"><span class="roman font">5</span></span><span class="mtd"><span class="roman font">9</span></span></span><span class="mtr non-leaf"><span class="mtd"><span class="roman font">5</span></span><span class="mtd"><span class="roman font">4</span></span><span class="mtd"><span class="roman font">0</span></span></span></span></span>&nbsp;</div>