Many citizens do not understand why the pending health care plan has become such a complicated problem.

The question of transit became a difficult and complicated problem.

They are very complicated problems that need sensitivity and respond over time.

He called health care "the most complicated problem I ever messed with."

Still, most of the enterprises that built the city face complicated problems.

However, there is a very complicated problem, which I have already mentioned.

Two centuries later, the federal government faces a more complicated problem.

Some need only a sympathetic ear, but others show up with much more complicated problems.

I was trained as a scientist to do research, to work on complicated problems.

These are people who generally want to help, but don't have the experience to solve more complicated problems easily.