Simplify each of the following:
$23 - [23 - {23 - (23 - 23 - 23)}]$

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Solution

On applying the BODMAS rule, we get:

23 $-$ [23 $-$ {23 $-$ (23 $-$ $23 - 23$ )}]
= 23 $-$ [23 $-$ {23 $-$ (23 $-$ 0}] (On simplifying vinculum)
= 23 $-$ [23 $-$ {23 $-$ 23}] (On simplifying parentheses)
= 23 $-$ [23 $-$ 0] (On simplifying braces)
= 23 $-$ 23 = 0

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