The phrase "a complicated task and" is correct and usable in written English.
It can be used when discussing a task that is complex and may require additional information or context to complete.
Example: "Completing the project will involve a complicated task and several steps that need to be followed carefully."
Alternatives: "a complex task and" or "a challenging task and".
Maintaining church buildings is a complicated task and the debate surrounding it is far from simple.
It is a complicated task and no single traditional approach is found to be successful in handling this problem.
Determination of ballistic performance of an armor solution is a complicated task and evolved significantly with the application of finite element methods (FEM) in this research field.
However, designing the hemmed union is a complicated task and is deeply influenced by the mechanical properties of the material of the bent part.
The clinical laboratory analysis of in vitro coagulation function is fairly a complicated task and coagulation testings are further compromised by the necessity of highly artificial testing environment.
This paper proposes a new communication and control architecture which improves the capability and the flexibility of multiple autonomous robot systems in performing a complicated task and coping with unpredictable situations.
While acknowledging that assessing the effect of unions is a complicated task, Golde and Hewitt stand by their work.
While in-flight ash detection is still a complicated task (Prata and Tupper 2009), airspace contamination by volcanic ash at the time of the Eyjafjallajökull eruption was confirmed for large areas of Europe by direct sampling (Schumann et al. 2011) or LIDAR measurements (Wiegner et al. 2012).
"A colleague and I had a complicated task to complete, and our manager decided we could do it best off site, in the quiet of my colleague's home," writes Nancy Cheser of Naples, Fla., recalling her days as a systems analyst in Springfield, Mass.
The problem has been that designing, say, a dodecahedron is a tremendously complicated task, and few have the expertise to assemble such a complex molecule, composed of thousands of base pairs, by hand.
The related calculation remains a complicated task to perform and requires enormous computing time.
