Let's solve the expression step by step:

### Expression:
\[
986 - [100 - \{-854 + (-213) - (-245)\} + 523]
\]

### Step 1: Simplify the expression inside the curly braces.

\[
-854 + (-213) = -1067
\]
\[
-1067 - (-245) = -1067 + 245 = -822
\]

So, the expression becomes:
\[
986 - [100 - (-822) + 523]
\]

### Step 2: Simplify inside the square brackets.

\[
100 - (-822) = 100 + 822 = 922
\]
\[
922 + 523 = 1445
\]

Now, the expression is:
\[
986 - 1445
\]

### Step 3: Subtract.
\[
986 - 1445 = -459
\]

### Final Answer:
\[
\boxed{-459}
\]

Would you like a detailed breakdown of any step? Here are some related questions to consider:

1. What are the rules for simplifying expressions with nested parentheses?
2. How do you handle adding and subtracting negative numbers?
3. Why is it important to follow the order of operations (PEMDAS)?
4. Can you explain how parentheses affect subtraction operations?
5. How do you deal with large negative and positive numbers in subtraction?

**Tip:** Always simplify the innermost parentheses first before moving outward.

986 - [100 - {-854 + (-213) - (-245)} + 523]

Solve the expression 986 - [100 - {-854 + (-213) - (-245)} + 523] using step-by-step methods. Learn key arithmetic concepts such as handling negative numbers, nested parentheses, and applying the order of operations. Suitable for Grades 6-8.

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