Question

(15-28:7)-{[(12-35:7)-(-4+3x8)]-(5+3x2)}

Answer 1

(15-28:7)-{[(12-35:7)-(-4+3x8)]-(5+3x2)}
(15-4)-{[(12-5)-(-4+24)]-(5+6)}
11-{[7-20]-11}
11-{-13-11}
11+24
35