curl --request POST \
  --url https://api.iotools.cloud/v1/tool/order-of-operations-calculator-pemdas \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "expression": "3 + 4 * 2 / (1 - 5)^2",
  "precision": "6"
}
'

{
  "tool": "order-of-operations-calculator-pemdas",
  "tool_version": "1.0.2",
  "outputs": {
    "result": "3.5",
    "isInteger": "No",
    "steps": "3 + 4 * 2 / (1 - 5)^2 = 3.5\n\nStep 1: 4 × 2 = 8\nStep 2: 1 - 5 = -4\nStep 3: (-4) ^ 2 = 16\nStep 4: 8 ÷ 16 = 0.5\nStep 5: 3 + 0.5 = 3.5"
  },
  "credits_used": 5,
  "credits_remaining": null
}