z_1+z_2

Z_1 = (5, -1)
Z_2 = (2, 3)
z_1 = Vector((0.0, 0.0), Z_1)
z_2 = Vector((0.0, 0.0), Z_2)
u: z_1 + z_2
C = Point(Vector[z_1 + z_2])
E: (0.0, 0.0) + z_1 + z_2
v = Vector(Z_1, E)
w = Vector(Z_2, E)