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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def fix_html(x:str) -> str:
    "List of replacements from html strings in `x`."
    re1 = re.compile(r'  +')
    x = x.replace('#39;', "'").replace('amp;', '&').replace('#146;', "'").replace(
        'nbsp;', ' ').replace('#36;', '$').replace('\\n', "\n").replace('quot;', "'").replace(
        '<br />', "\n").replace('\\"', '"').replace('<unk>',UNK).replace(' @.@ ','.').replace(
        ' @-@ ','-').replace(' @,@ ',',').replace('\\', ' \\ ')
    return re1.sub(' ', html.unescape(x))