<p>Simplify :&nbsp;</p>
<p>&nbsp;<span class="math-editor mathquill-rendered-math"><span class="fraction non-leaf"><span class="numerator"><var>x</var><span class="binary-operator">&minus;</span><var>y</var></span><span class="denominator"><var>x</var><span class="binary-operator">+</span><var>y</var></span><span style="display: inline-block; width: 0;">&nbsp;</span></span><span class="binary-operator">&minus;</span><span class="fraction non-leaf"><span class="numerator"><var>x</var>&sup2;<span class="binary-operator">&minus;</span>2<var>y</var></span><span class="denominator"><var>x</var>&sup2;<span class="binary-operator">&minus;</span><var>y</var>&sup2;</span><span style="display: inline-block; width: 0;">&nbsp;</span></span></span>&nbsp;</p>