((7,9-47,42):1,25+(6,7-17,28)):(0,38-0,108)*16-19,25
1. 7,9-47,42=-39,52
2. (-39,52)/1,25= (-31,616)
3. 6,7-17,28=(-10,58)
5. (-31,616)+(10,58)=(-42,196)
6. 0.38-0.108= 0.272
7. 0.272*16= 4.352
8. 4.352-19.25= -14.898
9. (-42,196)/(-14.898)=2.83
Ответ= 2.83