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

We are the most complex living system so far known.

We have one of the most complex court systems in the nation.

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

Its language is one of the most complex on earth.

However, it is also one of the most complex areas.

This change of heart makes him the play's most complex character.

Which was about the most complex technology in those days.

A mind is the most complex of things to create.

The human mind is the most complex machine on Earth.