(56+12):2=56:2+12:2=28+6=34
(170+560):10=170:10+560:10=17+56=73
(72+96):12=72:12+96:12=6+8=14
(148+280):4=148:4+280:4=37+70=107
(360+80):40=360:40+80:40=9+2=11
(120+300):60=120:60+300:60=2+5=7
(280+280):70=280:70+280:70=4+4=8
(150+450):50=150:50+450:50=3+9=12.
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(56+12):2=56:2+12:2=28+6=34
(170+560):10=170:10+560:10=17+56=73
(72+96):12=72:12+96:12=6+8=14
(148+280):4=148:4+280:4=37+70=107
(360+80):40=360:40+80:40=9+2=11
(120+300):60=120:60+300:60=2+5=7
(280+280):70=280:70+280:70=4+4=8
(150+450):50=150:50+450:50=3+9=12.