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