How to do string calculation in JS?

Question

JavaScript

What function should be written in JS to evaluate the following expressions?

"'2 + 2" -> 4

"(3 + 7) / (5 - (2 + 1))" -> 5

Answer 1

1) In the forehead and the least safe - eval
2) A little more confusing - we wrap it in a function through new Function
3) Confusing, but interesting - parse the string, split it into operators and operands and count it all, taking into account the priority of operators and brackets
4) Boring and ordinary - we take a library like mathjs and feed it