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