class Coordinate(): def __init__(self, x, y) -> None: self.x = x self.y = y def __str__(self) -> str: return f'({self.x}, {self.y})' def __add__(self, other): return Coordinate(self.x + other.x, self.y + other.y) x1,y1 = map(int, input().split()) x2,y2 = map(int, input().split()) c1 = Coordina...