import math

class Complex: def init(self, real, imaginary): self.real = real self.imaginary = imaginary

def __add__(self, other):
    """ Addition of two complex numbers """
    return Complex(self.real + other.real, self.imaginary + other.imaginary)

def __sub__(self, other):
    """ Subtraction of two complex numbers """
    return Complex(self.real - other.real, self.imaginary - other.imaginary)

def __mul__(self, other):
    """ Multiplication of two complex numbers """
    real_part = self.real * other.real - self.imaginary * other.imaginary
    imaginary_part = self.real * other.imaginary + self.imaginary * other.real
    return Complex(real_part, imaginary_part)

def __truediv__(self, other):
    """ Division of two complex numbers """
    denominator = other.real**2 + other.imaginary**2
    if denominator == 0:
        raise ZeroDivisionError("Complex division by zero")

    # Multiply the numerator (self) by the conjugate of the denominator
    conjugate = Complex(other.real, -other.imaginary)
    numerator = self * conjugate
    real_part = numerator.real / denominator
    imaginary_part = numerator.imaginary / denominator
    return Complex(real_part, imaginary_part)

def mod(self):
    """ Modulus (magnitude) of the complex number """
    return Complex(math.sqrt(self.real**2 + self.imaginary**2), 0)

def __str__(self):
    """ String representation of the complex number in the format X.XX+Y.YYi """
    if self.imaginary == 0:
        return f"{self.real:.2f}+0.00i"
    elif self.real == 0:
        return f"0.00{'+' if self.imaginary >= 0 else '-'}{abs(self.imaginary):.2f}i"
    else:
        return f"{self.real:.2f}{'+' if self.imaginary >= 0 else '-'}{abs(self.imaginary):.2f}i"

if name == 'main': c = map(float, input().split()) d = map(float, input().split()) x = Complex(*c) y = Complex(*d) print(*map(str, [x+y, x-y, x*y, x/y, x.mod(), y.mod()]), sep='\n')