Question

Simplify:

$-48-\left[18-\left\{\left(-16\right)-\left(5-\overline{4-7}\right)\right\}\right]$

Answer 1

$-48-[18-((-16)-(5-(4-7\left)\right)\left)\right]$

$\Rightarrow$ $-48-[-18((-16)-(5-(-3\left)\right)\left)\right]$

$\Rightarrow$ $-48[18-(-16)-8)]$

$\Rightarrow$ $-48[18-(-24\left)\right]$

$\Rightarrow$ $-48-(18+24)$

$\Rightarrow$ $-48-42$

$\Rightarrow$ $-90$