title: Sympy doesn't print equations when using matplotlib in PyCharm
body: <p>I recently started using Pycharm instead of Jupyter on my laptop to do some light scientific work(mainly because I like how it auto-completes the code). 
  this code works fine I Jupyter </p>
  
  <pre><code>import sympy as sp
  import matplotlib.pyplot as plt
  
  x = sp.symbols("x")
  sp.Integral(x, x)
  </code></pre>
  
  <p>but when I run it in Pycharm, nothing happens and I don't get any output and I don't know why.</p>