Answer:
the answer is 90 (typing more to reach the limit)
The symbols, you mean? Those are called "parentheses".
Step-by-step explanation:
To find : Solve the expressions ?
Solution :
1) 15 divided by 3

2) 21 divided by 3

3) 16 divided by 2

4)27 divided by 3

5) 0 divided by 3

6) 9 divided by 3

7) 30 divided by 3

8) 12 divided by 4

9) 12 divided by 3

10) 15 divided by 3

11) 24 divided by 3

12) 9 divided by 3

Answer:
7/13
Step-by-step explanation: