anchor.diff:      eval = e2.evaluate(interval, cm);
       expect(eval, equals(int1 / int2));
   
  +    //TODO
   //    eval = e3.evaluate(interval, cm);
   //    expect(eval, equals(i1 ^ i2));
   
  
positive.code:     eval = e2.evaluate(interval, cm);
      expect(eval, equals(ri1 / ri2));
  
  //    eval = e3.evaluate(interval, cm);
  //    expect(eval, equals(ri1 ^ ri2));
  
  
negative.code:     'Expression REAL Creation': simpleRealCreation,
      'Expression INTERVAL Creation': simpleIntervalCreation,
      'Expression VECTOR Creation': simpleVectorCreation,
      'Binary Op Convenience Creation': convenienceBinaryCreation,
      'Unary Op Convenience Creation': convenienceUnaryCreation,
      'Simple REAL evaluation': simpleRealEval,
      'Simple INTERVAL evaluation': simpleIntervalEval,
      'Simple VECTOR evaluation': simpleVectorEval,
  