Question

CALCULE O VALOR DA EXPRESAO 3-{-5-[6-2+(-6+9)]}

Answer 1

$3-\{-5-[6-2+(-6+9)]\}= \\ 3-\{-5-[6-2+3]\}=\\ 3-\{-5-7\}=\\ 3-\{-12\}=\\3+12=15$