[
  {
    "inputs": [
      1,2,3,4
    ],
    "initial": "0",
    "operation": "+",
    "expected": "10"
  },
  {
    "inputs": [
      2,3,4,5
    ],
    "initial": "1",
    "operation": "*",
    "expected": "120"
  },
  {
    "inputs": [
      2,3,4,5
    ],
    "initial": "0",
    "operation": "*",
    "expected": "0"
  },
  {
    "inputs": [
      2,4,6
    ],
    "initial": "2",
    "operation": "*2*",
    "expected": "768"
  }
]