For the function f(x) = -3sin(3π(5(-3|((-1x + 1)/(3x - 2)) - 1| + 1)^2 + 5(-3|((-1x + 1)/(3x - 2)) - 1| + 1) - 3)) + 3, 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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