{
  "description": "x*y appears twice and is one node, used by both sin and the sum",
  "calls": {
    "handle_set_function": {
      "args": {
        "expression": "x*y + sin(x*y)"
      },
      "result": {
        "inputs": [
          "x",
          "y"
        ],
        "constants": {},
        "nodes": [
          {
            "id": "w1",
            "kind": "input",
            "name": "x"
          },
          {
            "id": "w2",
            "kind": "input",
            "name": "y"
          },
          {
            "id": "w3",
            "kind": "op",
            "op": "mul",
            "args": [
              "w1",
              "w2"
            ]
          },
          {
            "id": "w4",
            "kind": "op",
            "op": "sin",
            "args": [
              "w3"
            ]
          },
          {
            "id": "w5",
            "kind": "op",
            "op": "add",
            "args": [
              "w3",
              "w4"
            ]
          }
        ],
        "output": "w5"
      }
    }
  }
}