#### Answer

-20

#### Work Step by Step

Using order of operations, first solve expression inside parentheses, then solve exponents, then multiply, and finally subtract.
$2^{2}$ - 3[(2 - 8) - (-6 - 8)] = $2^{2}$ - 3[-6 - (-14)] = $2^{2}$ - 3(8) = 4 - 3(8) = 4 - 24 = -20