Can you tell me if my answers are correct for these problems?

Question

1. 3i - 10
---------
8i - 5

Answer 74 65i
---- + -----
89 89

2. 11i^2 + 1
-----------
-12i - 8

Answer: 5 (2 - 3 i)
-------------
26

3. square root -25 * 8 square root -49

Answer: -280

4. square root -64 + 12 square root -36

Answer: 80 i

5. square root -13 - 6 square root -13

Answer: -5 i square root 13

Answer 1

(sorry this formatted weirdly, it's meant to be this if you can't tell)

1. 3i - 10 over 8i - 5

Answer: 74 over 89 + 65 i over 89

2. 11i^2 + 1 over -12i - 8

Answer: 5 (2 - 3 i) over 26