Let's go through Edward's steps one by one to see if the calculations are correct.
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Starting with the original expression: \( 366 - 3[8 + 2(6 + 1)] \)
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Calculate the expression inside the innermost parentheses: \( 6 + 1 = 7 \) Substitute this into the expression: \( 366 - 3[8 + 2(7)] \)
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Now calculate \( 2(7) \): \( 2 \times 7 = 14 \) Substitute this into the expression: \( 366 - 3[8 + 14] \)
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Now add \( 8 + 14 \): \( 8 + 14 = 22 \) Substitute this into the expression: \( 366 - 3[22] \)
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Now multiply \( 3 \times 22 \): \( 3 \times 22 = 66 \) Substitute this into the expression: \( 366 - 66 \)
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Finally, perform the subtraction: \( 366 - 66 = 300 \)
So the final result of \( 366 - 3[8 + 2(6 + 1)] \) should be \( 300 \), not \( 156 \).
Edward's work is incorrect. The correct answer is \( 300 \).