A = (-200, 500)
B = (100, 800)
u = Vector(A, B)
C = (11.412681600229156, 322.82536320045836)
D = (313.5702818143103, 646.4828957733073)
E = (460.0556143991978, 827.9755600085936)
F = (160.0556143991979, 527.9755600085934)
w = Vector(E, F)
v: 2.0 * u