This is the 1399th most frequent Turkish word.
çalışmalarının
"Of his/her/its/their works/studies."
In this sentence, 'çalışmalarının' acts as a possessive noun (being the plural of 'çalışma' with a possessive suffix - 'çalışmalar'), indicating 'of the artist's works'.
Sanatçının çalışmalarının hepsi sergide sergilendi.
All of the artist's works were displayed in the exhibition.
Here, 'çalışmalarının' again functions as a possessive noun, emphasizing the quality aspect of the teacher's efforts.
Eğitmenin çalışmalarının kalitesi her zaman yüksek değerlendiriliyor.
The quality of the teacher's efforts is always rated high.
In this context, 'çalışmalarının' refers to the scientists' studies, again expressing possession and origin of the research results.