For the function f(x) = 3((-3(3|(3x + 5)| - 1) - 2)/(-2(3|(3x + 5)| - 1) + 3))^2 - 4((-3(3|(3x + 5)| - 1) - 2)/(-2(3|(3x + 5)| - 1) + 3)) - 5, find the number of maximal connected intervals in [-10, 10] where f'(x) < 0.

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