For the function f(x) = -2cos(2π((-3(3(-3|x + 1| + 3)^2 - 1(-3|x + 1| + 3) + 2) - 1)/(1(3(-3|x + 1| + 3)^2 - 1(-3|x + 1| + 3) + 2) - 2)) + 3) - 3, find the number of maximal connected intervals in [-10, 10] where f'(x) < 0.

Present the answer in LaTex format: \boxed{Your answer}
user