Simplify the following mathematical expression:
$12$ of $9 - {13 + 2 (7 + 2 - 1)}$

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Solution

Finding the value of an expression:
Step : Simplifying the expression using BODMAS.
$12$ of $9 - {13 + 2 (7 + 2 - 1)}$
$= (12 \times 9) - {13 + 2 (9 - 1)}$
$= 108 - {13 + 2 (8)}$
$= 108 - {13 + 16}$
$= 108 - 29$
$= 79$
Hence, the value of the expression is $79$ .

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