title: Sympy simplification is broken (square roots)?
body: <p>I tried this in python shell</p>
  <pre><code>&gt;&gt;&gt; from sympy import sqrt
  &gt;&gt;&gt; sqrt((-9/10 + 6*sqrt(3)/5)**2 + (6/5 + 9*sqrt(3)/10)**2)
  sqrt((-0.9 + 6*sqrt(3)/5)**2 + (1.2 + 9*sqrt(3)/10)**2)
  </code></pre>
  <p>and when type it in google:</p>
  <p><a href="https://i.stack.imgur.com/fW6Zw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fW6Zw.png" alt="Google Calculator" /></a></p>
  <p>So how do I get numpy to give me a more simpilified result (it won't always be an int so I cant use evalf or N)</p>