Question

4+{-12-[12+(-1+(-6))+15]}​

Answer 1

PROCEDIMIENTO:

$4+\left(-12\right)-\left[12+\left(-1+\left(-6\right)\right)+15\right]\\4-12-[12+(-1-6)+15]\\4-12-[12+(-7)+15]\\4-12-(12-7+15)\\4-12-20\\-28$

Resultado: -28

Atte: Sabius95