For the function f(x) = -4(3|((-2(2sin(2πx + 3) + 3) - 1)/(1(2sin(2πx + 3) + 3))) - 3| - 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}
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