Question

-20-{-2+[1+(+9-5)-2]+15-9} Me Ajudem ... Er Pra Hj

Answer 1

    -20-{-2+[1+(+9-5)-2]+15-9} ⇔
⇔-20-{-2+[1+4-2]+15-9} ⇔
⇔-20-{-2+3+15-9} ⇔
⇔-20-7⇔
⇔-27

Bom estudo! :)