The extracted text from the image appears to be incomplete and not entirely accurate. However, I can manually read the image and guide you through solving the given combinations.

The image shows columns of numbers with operations of addition and subtraction that need to be performed. Here are the operations as they appear in the image:

1. $8 - 47 + 51 + 71 = ?$
2. $36 - 18 = ?$
3. $68 - 48 - 94 = ?$
4. $38 - 31 - 4 = ?$
5. $81 - 51 - 3 = ?$
6. $98 - 6 - 39 = ?$
7. $61 - 24 - 25 = ?$

Let's solve these step by step.

Solutions:

1. $8 - 47 + 51 + 71$

   = -39 + 51 = 12 \\ = 12 + 71 = 83$$

2. $36 - 18$ $= 18$

3. $68 - 48 - 94$

   = 20 - 94 = -74$$

4. $38 - 31 - 4$

   = 7 - 4 = 3$$

5. $81 - 51 - 3$

   = 30 - 3 = 27$$

6. $98 - 6 - 39$

   = 92 - 39 = 53$$

7. $61 - 24 - 25$

   = 37 - 25 = 12$$

The answers for the combinations are:

1. $83$
2. $18$
3. $-74$
4. $3$
5. $27$
6. $53$
7. $12$

Would you like more details or have any questions?

Here are 5 related questions to expand your understanding:

1. How do you handle operations with negative numbers?
2. What is the order of operations in arithmetic?
3. How do you add and subtract larger numbers without a calculator?
4. Can you create similar problems to practice more?
5. What are some common mistakes to avoid when performing arithmetic operations?

Tip: Always remember to perform operations step by step and double-check each calculation to avoid errors.