Question

ayuda
4-16-{-30-[40+(16-20)]}

Answer 1

$4 - 16 - ( - 30 - (40 + (16 - 20))) = \\ 4 - 16 - ( - 30 - (40 - 4)) = \\ 4 - 16 - ( - 30 - 36) = \\ 4 - 16 + 66 = 54$