Johan Formula

[
    {
        "type": "number",
        "value": "10"
    },
    {
        "type": "operator",
        "value": "/"
    },
    {
        "type": "parentheses",
        "value": null,
        "elements": [
            {
                "type": "number",
                "value": "2"
            },
            {
                "type": "operator",
                "value": "+"
            },
            {
                "type": "number",
                "value": "1"
            }
        ]
    }
]