Ответ:\(34+9=43\); \(72+8=80\).\(53-8=45\); \(50-7=43\).\(5+9-6=8\); \(90-(13-6)=90-7=83\); \(17-(12-5)=17-7=10\); \(60+(14-8)=60+6=66\).Ответ: 43; 80; 45; 43; 8; 83; 10; 66.