For the function f(x) = 3|(1(-4(-3cos(2πx + 1) - 1) - 1)^2 + 4(-4(-3cos(2πx + 1) - 1) - 1) + 5) + 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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