(50-23):3+8*5-6*5-(26-16)*6 ,(5*6-3*4+48:6)+(82-78)*7-13,(69-45):3*2+(43-34)*2
50-23=27
(50-23) /3+8*5-6*5=(26-16)*6= - 41 (5*6-3*4+49:6)+82-78)*7-13=41 (69-45):3*2+(43-34)*2=34
1. (50-23):3+8*5-6*5-(26-16)*6=9+40-60=49-60=-11; 2. (5*6-3*4+48:6)+(82-78)*7-13=(30-12+8)+28=26+28=56; 3.(69-45):3*2+(43-34)*2=4+18=22.