title: Simplify expression Boolean-Algebra
body: <p>For my class I have to study some Boolean algebra. Now I'm having some difficulties with simplifying expression.</p>
  
  <p>For example I get: </p>
  
  <pre><code>A.B.C + NOT(A) + NOT(B) + NOT(C)
  </code></pre>
  
  <p>I tried checking wolfram alpha but there's not simplification showing up there.
  Can you tell me how to simplify this expression?</p>
  
  <p>Thanks in advance</p>