[ { "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" } ]