local Vector3 = {}

Vector3.functions = {}

Vector3.functions.__add = function(this, other)
    return Vector3.new(this.X + other.X, this.Y + other.Y, this.Z + other.Z)
end

Vector3.functions.__sub = function(this, other)
    return Vector3.new(this.X - other.X, this.Y - other.Y, this.Z - other.Z)
end

Vector3.setup = function(new)
    return setmetatable(new, Vector3.functions)
end

Vector3.new = function(x, y, z)
    return Vector3.setup({
        X = x, Y = y, Z = z,
        magnitude = math.sqrt(x^2 + y^2 + z^2)
    })
end

local x = Vector3.new(10, 15, 20) + Vector3.new(5, 5, 5) - Vector3.new(50, 50, 0)