The phrase "a complicated and difficult" is correct and usable in written English.
It can be used to describe a situation, task, or concept that is both complex and challenging to understand or accomplish.
Example: "The project turned out to be a complicated and difficult endeavor that required extensive research and collaboration."
Alternatives: "a complex and challenging" or "a intricate and tough".
"The issue of relations between Iran and America is a complicated and difficult issue," Rohani said.
"Making games is a complicated and difficult business, in fact it's brutal," he clarifies.
Any effort to rewrite gun laws in Congress would certainly be a complicated and difficult task.
"The relationship between Iran and the United States is a complicated and difficult question," he says.
"Relations between Iran and America are a complicated and difficult issue," he said.
The panel, appointed as part of a novel legal agreement between the city and lawyers who had sued, seeking a takeover of the agency, credited the city with a "sustained, intelligent effort to change a complicated and difficult system".
Quality of care has become an important indicator of health system performance and access to healthcare. 1 However, measuring quality of care is a complicated and often difficult task due to its characteristics such as intangibility (dependence on facility performance rather than product), non-uniform client perceptions, and the role of clients in producing care.
He also worried that Congress would not be receptive to the idea of Treasury taking an ownership stake in banks: "This is a very complicated and difficult sell.
And it's an artistic pursuit, and Polanski, for instance, had a very complicated and difficult life.
The FDIC's responsibility turns out to be an extremely complicated and difficult task, precisely because the largest modern banks are so big, and are structured in Byzantine fashion.
Baker told BBC Radio 4's Today programme on Thursday: "This is a challenging and complicated and difficult issue.
