Question

{-4+1-[-5+3-(-4+7)+1]-2}-1​

Answer 1

{-4+1-[-5+3-(-4+7)+1]-2}-1

{-4+1-[-5+3-3+1]-2}-1

{-4+1-(-4)-2}-1

{-4+1+4-2}-1

-1-1

-2