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'''

Created on May 10, 2015

@authorr: Chocolate

'''

from math import sqrt;

class MyClass(object):

def __init__(self, real=0.0,imag=0.0):

self.real=real;

self.imag=imag;

def __add__(self, x):

r=self.real+x.real;

i=self.imag+x.imag;

return MyClass(r,i);

def __sub__(self, x):

r=self.real-x.real;

i=self.imag-x.imag;

return MyClass(r,i);

def __mul__(self, x):

r=(self.real*x.real)-(self.imag*x.imag);

i=(self.real*x.imag)+(self.imag*x.real);

return MyClass(r,i);

def __div__(self, x):

'''

float div=(x.real*x.real) + (x.imag*x.imag);

complex tmp;

tmp.real=(real*c.real)+(imag*c.imag);

tmp.real/=div;

tmp.imag=(imag*c.real)-(real*c.imag);

tmp.imag/=div;

return tmp;

'''

d=(x.real*x.real) + (x.imag*x.imag);

r=(self.real*x.real)+(self.imag*x.imag);

r=r/d;

i=(self.imag*x.real)-(self.real*x.imag);

i=i/d;

return MyClass(r,i);

def modu(self):

z=(self.real*self.real)+(self.imag*self.imag);

return sqrt(z);

def __str__(self):

if(self.imag<0):

#print "%.2f %.2f" % (self.real, self.imag),"i"

return str("%.2f - %.2fi" % (self.real, abs(self.imag)))

#print "%.2f + %.2f" % (self.real, self.imag),"i"

return str("%.2f + %.2fi" % (self.real, self.imag))

n1,n2=map(float,raw_input().split());

n3,n4=map(float,raw_input().split());

a=MyClass(n1+0.0,n2+0.0);

b=MyClass(n3+0.0,n4+0.0);

print(a+b);

print(a-b);

print(a*b);

print(a/b);

print(round(a.modu(),2));

print(round(b.modu(),2));

#print a+b;