3 - [4 + {6 - (7 + 5 x 3)} - 2] ÷ 7
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Answer:
3 - [4 + {6 - (7 + 5 x 3)} - 2] ÷ 7
= 3 - [4 + {6 - ( 7 + 15)} - 2] ÷ 7
= 3 - [4 + {6 - 22} - 2] ÷ 7
= 3 - [4 + {-16} - 2] ÷ 7
= 3 - [ -12- 2] ÷ 7
= 3 - [ -14] ÷ 7
= 3 - (-2)
= 3 + 2
= 5
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