def u(x,y):
	return x*y;

def du_x(x,y):
	return y;

def du_y(x,y):
	return x;

def v(x,y):
	return 1 + pow(x,2) + pow(y,2);

def dv_x(x,y):
	return 2*x;

def dv_y(x,y):
	return 2*y;

def f(x,y):
	return u(x,y)/float(v(x,y));

def df_x(x,y):
	return (du_x(x,y)*v(x,y) - u(x,y)*dv_x(x,y))/float(pow(v(x,y),2));

def df_y(x,y):
	return (du_y(x,y)*v(x,y) - u(x,y)*dv_y(x,y))/float(pow(v(x,y),2)); 

def h(x,y):
	return (y - pow(x,2)*y + pow(y,3))/float(pow(1 + pow(x,2) + pow(y,2),2)); 

x = 1;
while(x<15):
	print  h(x,1)-df_x(x,1);
	x +=1;