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