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# Problem Challenge 1: Evaluate Expression (hard)

## Problem Statement

Given an expression containing digits and operations (+, -, *), find all possible ways in which the expression can be evaluated by grouping the numbers and operators using parentheses.

**Example 1**:

```
Input: "1+2*3"
Output: 7, 9
Explanation:
1+(2*3) => 7
(1+2)*3 => 9
```

**Example 2**:

```
Input: "2*3-4-5"
Output: 8, -12, 7, -7, -3
Explanation:
2*(3-(4-5)) => 8
2*(3-4-5) => -12
2*3-(4-5) => 7
2*(3-4)-5 => -7
(2*3)-4-5 => -3
```

## Try it yourself

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