def add(x, y):
    return f"{x + y:.2f}"


def subtract(x, y):
    return f"{x - y:.2f}"


def multiply(x, y):
    return f"{x * y:.2f}"


def divide(x, y):
    return f"{x / y:.2f}"


def power(x, y):
    return f"{x ** y:.2f}"
