class Coordinate: def __init__(self,x,y) -> None: self.x = x self.y = y def __str__(self): print(f'({self.x}, {self.y})') def __add__(self,c): return Coordinate(self.x+c.x,self.y+c.y) a,b = map(int,input().split()) c,d = map(int,input().split()) c1 = Coordinate(a,b) c2 = Coordinate(c,d) c3 = c1._...