Evaluate JavaScript Expression with evaluate() Function

`evaluate` is a function in JavaScript that takes a string expression and returns its evaluated value. It is used to execute a string as if it were a JavaScript expression.

Here's an example of how you can use `evaluate`:
```
const expression = "x + 5";
const result = evaluate(expression);
console.log(result); // Output: 6
```
In this example, the `evaluate` function takes the string expression `"x + 5"` and returns its evaluated value, which is `6`.

You can also use `evaluate` with a variable that contains a string expression, like this:
```
const expression = "x * 2";
const result = evaluate(expression);
console.log(result); // Output: 2x
```
In this case, the `evaluate` function takes the string expression stored in the `expression` variable and returns its evaluated value, which is `2x`.

Note that `evaluate` only works with simple expressions, such as arithmetic operations, and does not support more complex constructs like conditional statements or functions. If you need to evaluate a more complex expression, you may need to use a different approach.