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