For the function f(x) = 1(-3e^(1(-2((2x + 2)/(-3x + 2)) + 3)) + 1)^2 + 2(-3e^(1(-2((2x + 2)/(-3x + 2)) + 3)) + 1) + 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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