This is the 12567th most frequent Russian word.
комплексных
The Russian word "комплексных" means "complex" or "comprehensive" in English, depending on context.
Used as an adjective modifying 'задач', meaning 'complex'.
Комплексных задач не стоит бояться.
One should not fear complex tasks.
Refers to 'researches' conducted in a comprehensive manner.
Для комплексных исследований требуется специальное оборудование.
For complex studies, special equipment is required.
Used in the context of solutions that involve multiple aspects or systems.