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

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