from bs4 import BeautifulSoup
import requests
find = input ("Введите запрос: ")
response = requests.get('https://znanija.com/app/ask?entry=top&q=' + find)
soup = BeautifulSoup(response.text, 'html.parser')
tag = soup.find('div', {'class': 'sg-text js-answer-content brn-rich-content'})
print( str(tag) )