Question

Calcule 2+{ 3 -[ 1+ (2-5+4)] +8}

Answer 1

2+{3-[1+(+1)]+8}
2+{3-[2]+8}
2+{3-2+8}
2+{9}
R=11 
:) bons estudos :)

Answer 2

 2+{ 3 -[ 1+ (2-5+4)] +8}=
 2+{ 3 -[ 1+ 1] +8}=
 2+{ 3 - 2 +8}=
 2+9=11