calc_engine/json_generator/data.json

{
    "expression": "i + 2 + n",
    "variables": {
        "n1": {
            "name": "n1",
            "type": "Unknown",
            "starting_point": 0,
            "ending_point": 0
        },
        "i1": {
            "name": "i1",
            "type": "Unknown",
            "starting_point": 0,
            "ending_point": 0
        }
    }
}