import re


def simple_preprocess(text_list:list) -> list:
    """Performs simple preprocessing on the list of texts

    Args:
        text_list (list): list of texts

    Returns:
        list: list of preprocessed texts in tokens format
    """
    text_list = [x.lower() for x in text_list]
    text_list = [re.sub(r'[^\w]', ' ', x) for x in text_list]
    text_list = [x.split() for x in text_list]

    return text_list