For the function f(x) = (-2(2|(3sin(1πx - 2) + 1)| + 1))/(-1(2|(3sin(1πx - 2) + 1)| + 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}
user