</apple>[Ss]*?<apple(?:[Ss]*?</banana>s*){2}<banana>(.*)</banana>

</apple>[Ss]*?<apple(?:.*s*){3}(?:<banana>.*</banana>s*){2}<banana>(.*)</banana>

</apple>[Ss]*?<apple[^<banana>]*

<apple img="texta" name="namea">
   <pear width="1" height="11">
     <plum height="5">
       <banana>textb</banana>
       <banana>textc</banana>
       <banana>textd</banana>
     </plum>
   </pear>
</apple>
<apple img="text1" name="name1">
   <pear width="2" height="22">
     <plum height="6">
       <banana>text2</banana>
       <banana>text3</banana>
       <banana>text4</banana>
     </plum>
   </pear>
</apple>