Question

{30+[10-5+(2-3)]-18-12}​

Answer 1

{30+[10-5+(2-3)]-18-12}=
{30+[10-5+(-1)]-18-12}=
{30+[10-5-1]-18-12}=
{30+[4]-18-12}=
{30+4-18-12}=
4

Answer 2

Resposta:

Explicação passo a passo:
= {30+[10-5+(2-3)]-18-12}​
= {30+[5+(-1)]-30}
= 30-30+5-1
= 4