- Matching Digits Preceded by a Dollar Sign:

  - Text: "The price is $10"
  - Regex: `(?<=\$)\d+`
  - Result: Matches `10`.

- Matching Words Preceded by "Hello":

  - Text: "Say Hello world"
  - Regex: `(?<=Hello\s)\w+`
  - Result: Matches `world`.

- Matching URLs Preceded by "https://":

  - Text: "Visit our website at https://www.example.com"
  - Regex: `(?<=https:\/\/)\S+`
  - Result: Matches `www.example.com`.

- Matching Dates Preceded by "Date: ":

  - Text: "Date: 2024-02-13"
  - Regex: `(?<=Date: )\d{4}-\d{2}-\d{2}`
  - Result: Matches `2024-02-13`.

- Matching File Names Preceded by "File: ":

  - Text: "File: document.txt"
  - Regex: `(?<=File: )\S+`
  - Result: Matches `document.txt`.

- Matching Words Preceded by a Comma:

  - Text: "apple, orange, banana"
  - Regex: `(?<=,\s)\w+`
  - Result: Matches `orange` and `banana`.

- Matching Numbers Preceded by "Number: ":

  - Text: "Number: 12345"
  - Regex: `(?<=Number: )\d+`
  - Result: Matches `12345`.

- Matching Words Preceded by "Title: ":

  - Text: "Title: The Great Gatsby"
  - Regex: `(?<=Title: )\w+`
  - Result: Matches `The`.

- Matching Email Domains Preceded by "@":

  - Text: "Contact us at info@example.com"
  - Regex: `(?<=@)\S+`
  - Result: Matches `example.com`.

- Matching Words Preceded by "Word: ":

  - Text: "Word: example"
  - Regex: `(?<=Word: )\w+`
  - Result: Matches `example`.