21.   The move came after IRS officials told Congress that the credits added enormous complexity to calculating tax liability.

22.   The phasing out of these credits and deductions adds enormous complexity to the code.

23.   The ridge of high pressure migrated west from Europe over the course of the past several days, an unusual pattern that will add complexity to the forecast.

24.   This concentrates the flavor, deepening it and adding complexity, much as fermentation does to grape juice.

25.   Two male characters add needed complexity to the mix.

26.   The only safeguard, they say, is to make sure the board is representative of broad interests, even if it adds complexity.