1) XYXY+YXYX=ZZZ 2323+3232=555
2) ABCD+ABCD=DECB E-8 1402+1402=2804
3) EPPE-PEEP=NNCC 8338-3883=4455
1) 17*3=51
2) 42/6+4=11, 42/6+4=7+4=11
3) 18*5-60=30 18*5-60=90-60=30
4) 80/5*3=48 80/5*3=16*3=48
