title: Python3, best alternatives to eval()? (input as an expression)
body: <p>I'm using Python 3.</p>
  
  <p>I suppose the best way to ask this is how can I input an expression without using <code>eval(input("Input: "))</code>?</p>
  
  <p>I'm a simple user right now, so what I needed eval for was an algebra calculator.</p>