title: Regular expressions: contains at least two 0s but not consecutive 0s
body: <p>Is the solution of this exercise the below regular expression? I found it in the internet but I don't believe that this is correct.</p>
  
  <pre><code>(1*011*(0+011*))*
  </code></pre>
  
  <p>According to the theory of Chapter 1 in the book "The handbook of computational linguistics and natural language processing", how could I solve this exercise?</p>
  
  <p>I would like a regular expression that will satisfy the below regular language</p>
  
  <pre><code>    L = {010,0101,0110,0101010,01011110,.....}
  </code></pre>