–9 9 10 + –7 1 5

Let's solve the given expression:

$-9 + 9 + 10 + (-7) + 1 + 5$

Step-by-step solution:

1. Combine $-9$ and $9$: $-9 + 9 = 0$

2. Now the expression becomes: $0 + 10 + (-7) + 1 + 5$

3. Combine $10 + (-7)$: $10 - 7 = 3$

4. Add $3 + 1$: $3 + 1 = 4$

5. Add $4 + 5$: $4 + 5 = 9$

So, the final result is: $\boxed{9}$

Would you like any more details or have any questions?

Here are five related questions for practice:

1. Simplify $-8 + 8 + 12 + (-6) + 3 + 4$.
2. Evaluate $-7 + 7 + 15 + (-5) + 2 + 6$.
3. What is $-6 + 6 + 9 + (-8) + 4 + 7$?
4. Solve $-10 + 10 + 5 + (-3) + 8 + 2$.
5. Find the value of $-5 + 5 + 20 + (-10) + 1 + 0$.

Tip: When dealing with numbers and signs, always handle the signs first to avoid mistakes, such as misinterpreting a negative or positive number.