Architect expression to format +1XXXXXXXXXX to (XXX) XXX-XXXX

Architect & Flows
1

Can anyone clarify the correct syntax for an Architect expression to strip the +1 prefix and format a phone number into (XXX) XXX-XXXX? I need this for a ServiceNow field mapping.

  1. Source data arrives as +14165551234 in the phone attribute.
  2. I tried replace(replace(replace(phone, '+1', ''), ' ', ''), '-', '') but it leaves the raw digits.
  3. I cannot get the substring indices right to insert the parentheses and hyphens dynamically.

What is the exact expression string?