3a

-4b

2c

u = Vector((-1, 2, 0))
a = Vector((1, 0, 2))
b = Vector((1, 1, 1))
c = Vector((0, 3, -1))
v: (3 * a)
A = Point((0, 0, 0), v)
w = Translate(Vector[(-4 * b)], A)
B = Point(A, w)
d = Translate(Vector[(2 * c)], B)