title: How to evaluate power, root , factorial functions in java using JEval library?
body: <p>I am not getting how to perform these operations using JEval library in Java         </p>
  
  <pre><code>           String b = "8!"; // Not working
             String a = "2^2"; // Not Working
  
            Evaluator mEvaluator = new Evaluator();
      try {
          String r2 = mEvaluator.evaluate(b);
  
      } catch (EvaluationException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
      }
  </code></pre>
  
  <p>and i don't know how to get root in string ?</p>