"But these are complex problems that take time to solve."

"Everyone is trying to get their hands around a very complex problem," he said.

We think that it has to have a variety of skills because it's a very complex problem.

What constitutes a good reason is a more complex problem.

"But I am interested in training them to solve complex problems."

Snake found herself having to deal with the questions as if they were complex problems.

There are many complex problems of interpretation, in specific cases, within these general terms.

A number of very complex problems need to be solved first before we can take the second step.

I would like to finish by saying that this is a complex economic, political and social problem.

But even more important and complex problems lie ahead of that.