Question

qunto e -{+15-[(-4+20)-20]-17} calcule as expressões

Answer 1

$-(+15-((-4+20)-20)-17)=\\ -(+15-((16)-20)-17)=\\ -(+15-(-4)-17)=\\ -(+15+4-17)=\\ -(+19-17)=\\ -(+2)=\\ -2$