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Question

Simplify:
27 - [18 - {16 - (5 - 4 - 1¯)}]

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Solution

Given expression:
= 27 - [18 - {16 - (5 - 4-1)}]
=
27 - [18 - {16 - (5 - 3)}] [Removing bar]
=
27 - [18 - {16 - 2}] [Removing parentheses]
=
27 - [18 - 14] [Removing braces]
= 2
7 - 4 [Removing square brackets]
​= 23

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