perform the indicated operations.

13 + (-16)
3.039 - 12.92
(6.25) (0.88)
- 561 ÷ (-33)
- 2/5 + 7/15
- 4/9 - 5/6
(9) (-08) (-03)
13-(-5)-04
-75 ÷ 5
-315 ÷9÷(-07)​