Hi there!
---
After parse:
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              "init": {
                "type": "NumberLiteral",
                "value": 2
              }
            }
          ],
          "kind": "let"
        },
        {
          "type": "ExpressionStatement",
          "expression": {
            "type": "CallExpression",
            "callee": {
              "type": "MemberExpression",
              "object": {
                "type": "Identifier",
                "name": "console",
                "decorators": []
              },
              "property": {
                "type": "Identifier",
                "name": "log",
                "decorators": []
              },
              "computed": false,
              "optional": false
            },
            "arguments": [
              {
                "type": "BinaryExpression",
                "operator": "+",
                "left": {
                  "type": "Identifier",
                  "name": "m",
                  "decorators": []
                },
                "right": {
                  "type": "Identifier",
                  "name": "n",
                  "decorators": []
                }
              }
            ],
            "optional": false
          }
        }
      ]
    }
  }
}
---
{
  "type": "ScriptFunction",
  "id": {
    "type": "Identifier",
    "name": "main",
    "decorators": []
  },
  "generator": false,
  "async": false,
  "expression": false,
  "params": [],
  "body": {
    "type": "BlockStatement",
    "statements": [
      {
        "type": "VariableDeclaration",
        "declarations": [
          {
            "type": "VariableDeclarator",
            "id": {
              "type": "Identifier",
              "name": "m",
              "typeAnnotation": {
                "type": "ETSPrimitiveType"
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              "decorators": []
            },
            "init": {
              "type": "NumberLiteral",
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        ],
        "kind": "let"
      },
      {
        "type": "VariableDeclaration",
        "declarations": [
          {
            "type": "VariableDeclarator",
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              "type": "Identifier",
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              "typeAnnotation": {
                "type": "ETSPrimitiveType"
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              "decorators": []
            },
            "init": {
              "type": "NumberLiteral",
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        "kind": "let"
      },
      {
        "type": "ExpressionStatement",
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          "type": "CallExpression",
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            "type": "MemberExpression",
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              "type": "Identifier",
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                "decorators": []
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                "decorators": []
              }
            }
          ],
          "optional": false
        }
      }
    ]
  }
}
---
{
  "type": "Identifier",
  "name": "main",
  "decorators": []
}
---
{
  "type": "BlockStatement",
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      "type": "VariableDeclaration",
      "declarations": [
        {
          "type": "VariableDeclarator",
          "id": {
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            "name": "m",
            "typeAnnotation": {
              "type": "ETSPrimitiveType"
            },
            "decorators": []
          },
          "init": {
            "type": "NumberLiteral",
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          }
        }
      ],
      "kind": "let"
    },
    {
      "type": "VariableDeclaration",
      "declarations": [
        {
          "type": "VariableDeclarator",
          "id": {
            "type": "Identifier",
            "name": "n",
            "typeAnnotation": {
              "type": "ETSPrimitiveType"
            },
            "decorators": []
          },
          "init": {
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      "type": "ExpressionStatement",
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            "decorators": []
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            "decorators": []
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              "name": "n",
              "decorators": []
            }
          }
        ],
        "optional": false
      }
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}
---
{
  "type": "VariableDeclaration",
  "declarations": [
    {
      "type": "VariableDeclarator",
      "id": {
        "type": "Identifier",
        "name": "m",
        "typeAnnotation": {
          "type": "ETSPrimitiveType"
        },
        "decorators": []
      },
      "init": {
        "type": "NumberLiteral",
        "value": 1
      }
    }
  ],
  "kind": "let"
}
---
{
  "type": "VariableDeclarator",
  "id": {
    "type": "Identifier",
    "name": "m",
    "typeAnnotation": {
      "type": "ETSPrimitiveType"
    },
    "decorators": []
  },
  "init": {
    "type": "NumberLiteral",
    "value": 1
  }
}
---
{
  "type": "Identifier",
  "name": "m",
  "typeAnnotation": {
    "type": "ETSPrimitiveType"
  },
  "decorators": []
}
---
{
  "type": "ETSPrimitiveType"
}
---
{
  "type": "NumberLiteral",
  "value": 1
}
---
{
  "type": "VariableDeclaration",
  "declarations": [
    {
      "type": "VariableDeclarator",
      "id": {
        "type": "Identifier",
        "name": "n",
        "typeAnnotation": {
          "type": "ETSPrimitiveType"
        },
        "decorators": []
      },
      "init": {
        "type": "NumberLiteral",
        "value": 2
      }
    }
  ],
  "kind": "let"
}
---
{
  "type": "VariableDeclarator",
  "id": {
    "type": "Identifier",
    "name": "n",
    "typeAnnotation": {
      "type": "ETSPrimitiveType"
    },
    "decorators": []
  },
  "init": {
    "type": "NumberLiteral",
    "value": 2
  }
}
---
{
  "type": "Identifier",
  "name": "n",
  "typeAnnotation": {
    "type": "ETSPrimitiveType"
  },
  "decorators": []
}
---
{
  "type": "ETSPrimitiveType"
}
---
{
  "type": "NumberLiteral",
  "value": 2
}
---
{
  "type": "ExpressionStatement",
  "expression": {
    "type": "CallExpression",
    "callee": {
      "type": "MemberExpression",
      "object": {
        "type": "Identifier",
        "name": "console",
        "decorators": []
      },
      "property": {
        "type": "Identifier",
        "name": "log",
        "decorators": []
      },
      "computed": false,
      "optional": false
    },
    "arguments": [
      {
        "type": "BinaryExpression",
        "operator": "+",
        "left": {
          "type": "Identifier",
          "name": "m",
          "decorators": []
        },
        "right": {
          "type": "Identifier",
          "name": "n",
          "decorators": []
        }
      }
    ],
    "optional": false
  }
}
---
{
  "type": "CallExpression",
  "callee": {
    "type": "MemberExpression",
    "object": {
      "type": "Identifier",
      "name": "console",
      "decorators": []
    },
    "property": {
      "type": "Identifier",
      "name": "log",
      "decorators": []
    },
    "computed": false,
    "optional": false
  },
  "arguments": [
    {
      "type": "BinaryExpression",
      "operator": "+",
      "left": {
        "type": "Identifier",
        "name": "m",
        "decorators": []
      },
      "right": {
        "type": "Identifier",
        "name": "n",
        "decorators": []
      }
    }
  ],
  "optional": false
}
---
{
  "type": "MemberExpression",
  "object": {
    "type": "Identifier",
    "name": "console",
    "decorators": []
  },
  "property": {
    "type": "Identifier",
    "name": "log",
    "decorators": []
  },
  "computed": false,
  "optional": false
}
---
{
  "type": "Identifier",
  "name": "console",
  "decorators": []
}
---
{
  "type": "Identifier",
  "name": "log",
  "decorators": []
}
---
{
  "type": "BinaryExpression",
  "operator": "+",
  "left": {
    "type": "Identifier",
    "name": "m",
    "decorators": []
  },
  "right": {
    "type": "Identifier",
    "name": "n",
    "decorators": []
  }
}
---
{
  "type": "Identifier",
  "name": "m",
  "decorators": []
}
---
{
  "type": "Identifier",
  "name": "n",
  "decorators": []
}
---
After check:
---
After lowerings:
---