For the function f(x) = 1|(3(2sin(2π((-3x + 2)/(-2x - 3)) - 2) + 2)^2 - 1(2sin(2π((-3x + 2)/(-2x - 3)) - 2) + 2) + 3) - 2|, 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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