console.log(eval('2 + 2'));
// expected output: 4
console.log(eval(new String('2 + 2')));
// expected output: 2 + 2
console.log(eval('2 + 2') === eval('4'));
// expected output: true
console.log(eval('2 + 2') === eval(new String('2 + 2')));
// expected output: false