input: from typing import List
  
  def remove_punctuations(sentences: List[str]) -> List[str]:
      """ Removes all punctuations from a string of sentences.
      >>> remove_punctuations(["This is a sample string!", "Another sentence, with punctuations?"])
      ['This is a sample string', 'Another sentence with punctuations']
      """
output:     
      import string
      return [sentence.translate(str.maketrans('', '', string.punctuation)) for sentence in sentences]
  