This is the 3116th most frequent Russian word.
конкретных
Specific.
The word 'конкретных' is used here as an adjective modifying 'планов' (plans), indicating their specificity or clarity.
У нас пока нет конкретных планов на отпуск.
We still don’t have specific plans for the vacation.
In this sentence, 'конкретных' describes 'примеров' (examples), emphasizing that they should be specific.
Учитель попросил привести конкретных примеров из текста.
The teacher asked to provide specific examples from the text.
Here, 'конкретных' characterizes 'формул' (formulas), conveying that they are particular ones needed for the context.