import fractions
import decimal
import collections
import typing


MinMax = collections.namedtuple('MinMax', ['max_value', 'min_value'])


def get_max_and_min(data: typing.Set[typing.Union[decimal.Decimal, fractions.Fraction, str, int, float]]) -> typing.NamedTuple:

    numbers = []

    for num in data:
        if isinstance(num, str):
            if '\\' in num or '/' in num:
                num = num.replace('\\', '/').replace(' ', '')
                numbers.append(fractions.Fraction(num))
            else:
                numbers.append(decimal.Decimal(num))
        elif type(num) in (int, float, decimal.Decimal, fractions.Fraction):
            numbers.append(num)
        else:
            print('-' * 20)
            print(f'Not a number: {num}')
            print('-' * 20)

    return MinMax(max_value=max(numbers), min_value=min(numbers))


result = get_max_and_min({
    '1.1',
    5,
    5.1,
    decimal.Decimal('3.1'),
    fractions.Fraction('3/5'),
    '3 / 2',
    r'3 \ 3',
    r'4\2',
    '6/2',
})

print(f'MAX: {result.max_value}')
print(f'MIN: {result.min_value}')