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