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Let's solve this problem step by step using the order of operations (PEMDAS: Parentheses, Exponents, Multiplication/Division, Addition/Subtraction):
1. First, let's focus on what's inside the parentheses:
2. We need to evaluate the square root first:
(because )
3. Now our expression looks like this:
4. Next, we perform the addition inside the parentheses:
5. Our expression is now:
6. Finally, we perform the multiplication:
Therefore,
This matches the provided correct answer of 30.
30
\( 20\div(4+1)-3= \)
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