1. (34 +12) 2. 53+ (21 + 32) 3. + 28 5. 422 + (16 + 16) 4. (206 +358) + 24 (64 + 15) +542 = || 34+ (12+28) (53 +21) + 32 (422 + 16) + 16 206+ (358 +24) 65+ (15 + 542)​