title: Fractions+Symbols+Python3
body: <p>I want to write code in Python3, which deals with fractions and symbols. </p>
  
  <p>The code shall take in 2 fractions with symbols, do some basic arithmetics(+ and *), and deliver a fraction with symbols. Here an example:</p>
  
  <p>(3x/10) + (2y/20) = (3x+y)/10</p>
  
  <p>I could get the fractions work with <code>import fractions</code> and the symbols with <code>import sympy</code> but I couldn't get them work together. Neither did I find out how to do it purely in sympy.</p>
  
  <p>Greetings, 
  JP</p>