input: Write a python function to extract all 'div' elements from a webpage using BeautifulSoup and requests.
  assert extract_div_elements("https://www.example.com") == ['<div>Example Div 1</div>', '<div>Example Div 2</div>']
  assert extract_div_elements("https://www.example2.com") == ['<div>Sample Div A</div>', '<div>Sample Div B</div>']
  assert extract_div_elements("https://www.example3.com") == ['<div>Test Div X</div>', '<div>Test Div Y</div>']
output: def extract_div_elements(url):
      import requests
      from bs4 import BeautifulSoup
  
      response = requests.get(url)
      soup = BeautifulSoup(response.content, 'html.parser')
      divs = soup.find_all('div')
      return [str(div) for div in divs]