title: Laravel eloquent builders merge with OR condition
body: <p>I have built multiple Builder instances. Each of them contains some  complex "where" condition.</p>
  
  <p><a href="https://i.stack.imgur.com/WYO6G.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WYO6G.png" alt="enter image description here"></a></p>
  
  <p>I need to merge them into one big Builder to make only one request to the database.  They should all be merged as   ( ( builder 1 ) OR (builder 2) ....)  where each builder N expands to some SQL queries.</p>
  
  <p>In Yii I used this function <a href="http://www.yiiframework.com/doc/api/1.1/CDbCriteria#mergeWith-detail" rel="nofollow noreferrer">mergeWith</a> . I can't find similar functionality in Laravel. Could you please point me out how to do it properly via eloquent?</p>
  
  <p><strong>EDITED</strong></p>
  
  <p>This is how looks a <a href="http://kagda.ru/i/350141935584_11-12-2017-00:49:18_3501.png" rel="nofollow noreferrer">single Builder</a>,</p>
  
  <p>All other builders contain just different words in Where clause.</p>