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