<apply>
<times/>
<ci>x</ci>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<ci>c</ci>
</apply>
<apply>
<times/>
<apply>
<minus/>
<apply>
<power/>
<ci>b</ci>
<cn>2</cn>
</apply>
<apply>
<times/>
<cn>4</cn>
<ci>a</ci>
<ci>c</ci>
</apply>
</apply>
<cn>2</cn>
</apply>
</apply>
<apply>
<times/>
<cn>2</cn>
<ci>a</ci>
</apply>
</apply>
</apply>