The structure of this building is really complex, with many different levels and rooms.
The rules for this board game are quite complex and difficult to understand.
The situation my friend is in is quite complex, and I don't know how to help her.
The math problem was too complex for me to solve.
I find that learning a new language can be complex at times.
The human brain is a complex organ that continues to baffle scientists.
This math problem is too complex for me to solve on my own.
The situation at work became more complex with the arrival of a new boss.
The plot of the movie was quite complex and difficult to follow.
The instructions for assembling the bookshelf were a bit complex for me.
The design of this building is quite complex, with many intricate details and unique features.
The legal issues surrounding the case were so complex that even the judge had difficulty making a decision.
Learning a new language can be a complex process, but persistence will pay off in the end.
Understanding complex concepts in science requires a lot of concentration and effort.
Solving complex math problems is a challenge that requires patience and analytical skills.
Understanding the nuances of a foreign language can be a complex task, requiring plenty of practice and immersion.
The geometric patterns on the walls of the ancient temple were so complex that they left tourists in awe.
The process of developing a new software system can be quite complex, requiring careful planning at every stage.
The intricate details of the legal system can be complex, requiring a skilled attorney to navigate the process effectively.
The social dynamics of a new workplace can be complex, especially if you're trying to fit in with a diverse group of coworkers.
The relationships between characters in the novel were so complex that it was difficult to keep track of them all.
The painting's meaning was too complex for me to understand without reading the artist's statement.
The problem of climate change is complex and requires a multifaceted approach to find a solution.
Learning a complex language like Mandarin requires dedication, patience, and consistent practice.
The legal process involved in settling a complex business dispute can be lengthy and expensive.
The complex logistics of the event were handled well by the experienced event planner.
Despite its complex nature, the mathematical equation was solved with ease by the brilliant mathematician.
The complex flavors of the dish reflected the chef's mastery of culinary arts.
The complex web of relationships between the characters added to the intrigue of the novel.
Due to the complex procedure involved, the surgical operation was carried out by a team of highly skilled doctors.