9.2. Find the minimum value of the expression

$(3 \sqrt{2(1+\cos 2 x)}-\sqrt{8-4 \sqrt{3}} \sin x+2) \cdot(3+2 \sqrt{11-\sqrt{3}} \cos y-\cos 2 y) \cdot$ If the answer is not an integer, round it to the nearest integer.
Answer: -33. Instructions. Exact answer: $4 \sqrt{3}-40$.