For the function f(x) = (-3(1cos(2π(1x^2 + 3x + 2) + 3) + 1) - 3)/(-1(1cos(2π(1x^2 + 3x + 2) + 3) + 1) - 3), find the number of maximal connected intervals in [-10, 10] where f'(x) < 0.

Present the answer in LaTex format: \boxed{Your answer}
user