Answer
$120 $.
Work Step by Step
The given expression is
$=2^3+4\left [7^2 +\frac{15+6}{3-4} \right]$
Solve the fraction in the square bracket.
$=2^3+4\left [7^2 +\frac{21}{-1} \right]$
Calculate the exponent in the square bracket.
$=2^3+4\left [49 -21 \right]$
Subtract in the square bracket.
$=2^3+4\left [28 \right]$
Multiply.
$=2^3+112 $
Calculate the exponent.
$=8+112 $
Add.
$=120 $.