The problem is one of the most complex in modern American foreign policy.

They can be extremely complex or very simple in their construction.

Images of women are among the most complex in the show.

"This plane is more complex than any in history," he said.

Things are no less complex and confusing in the real world.

This form of contract is used for building works that are not complex in nature.

Green theory is complex in its management of policy networks.

Some claim the German tax system is the most complex one in the world.

The investigation is extremely complex in both economic and legal terms.

I know that this report is complex and sensitive in many areas.