console.log(Math.pow(7, 3));
// expected output: 343

console.log(Math.pow(4, 0.5));
// expected output: 2

console.log(Math.pow(7, -2));
// expected output: 0.02040816326530612
//                  (1/49)

console.log(Math.pow(-7, 0.5));
// expected output: NaN