The phrase "a complex and large" is correct and usable in written English.
It can be used to describe something that has both intricate details and significant size or extent.
Example: "The project involves a complex and large system that requires careful planning and execution."
Alternatives: "a complicated and extensive" or "a multifaceted and substantial".
This has been a complex and large investigation that has involved the examination of hundreds of messages sent on Twitter.
An example of a complex and large scale oil refinery planning is presented.
EHR adoption will require significant efforts with regard to workforce since it is a complex and large initiative in healthcare industry.
The main idea behind the method is to simplify the analysis by reducing the behavior of a complex and large structure to that of an isolated column.
Cardiff City said on its website: "We would like to thank all the supporters for their patience over the course of what has been a complex and large scale operation.
The vehicle characteristics, the grid-connection or electric vehicle supply equipment, the building loads and generators, the local distribution system, and energy markets must operate well together in a complex and large EV system [1].
The problem is inherently a complex and large-sized problem; therefore, we develop two algorithms: GA and hybrid GA with imperialist competitive algorithm.
As the design of AC usually requires a complex and large-size hardware circuits with respect to mobile devices [11, 14, 15], a combination of the latest PS and DC (referred to as PSDC) techniques will be an appropriate way to implement the mobile FD system [13, 14].
But most experts agree that building iPhones from scratch in the US is impractical and economically unfeasible, largely because the company relies on a complex and very large supply chain and manufacturing infrastructure already established around Shenzhen, China.
The current approach to investigating recirculation using simulation software requires manual effort which becomes tedious in a complex and a large network.
