I see the math problems in your image involve complex numbers. Let me solve a few of them for you step by step. I'll start with the first four problems in the image:

11. $(-4 - 7i) - (4 + 5i) - (2 - i)$

1. First, distribute the negative signs: $= -4 - 7i - 4 - 5i - 2 + i$
2. Combine like terms (real and imaginary): $= (-4 - 4 - 2) + (-7i - 5i + i)$ $= -10 - 11i$

So, the answer is $-10 - 11i$.

12. $(-1 + i) - (-7 + 4i) - 5$

1. Distribute the negative signs: $= -1 + i + 7 - 4i - 5$
2. Combine like terms: $= (-1 + 7 - 5) + (i - 4i)$ $= 1 - 3i$

So, the answer is $1 - 3i$.

13. $(-1 + 6i) + (5 - 2i) - (8i)$

1. Combine like terms (real and imaginary): $= (-1 + 5) + (6i - 2i - 8i)$ $= 4 - 4i$

So, the answer is $4 - 4i$.

14. $(1 + 6i) + (6 - 2i) - (-7 + 5i)$

1. Distribute the negative sign: $= 1 + 6i + 6 - 2i + 7 - 5i$
2. Combine like terms: $= (1 + 6 + 7) + (6i - 2i - 5i)$ $= 14 - i$

So, the answer is $14 - i$.

Would you like details on any of these steps? Feel free to ask, and I can also continue solving the rest of the problems.

Here are five related questions for practice:

1. How do you simplify the addition and subtraction of complex numbers?
2. What is the result of $(3 + 2i) + (4 - i)$?
3. What is the conjugate of the complex number $5 - 7i$?
4. Can complex numbers be ordered like real numbers? Why or why not?
5. How do you visualize complex numbers on the complex plane?

Tip: Always separate the real and imaginary parts when adding or subtracting complex numbers.