22 +17+ 38 +23=(22+38)+(17+23)=60=40=100
28+ 40 + 10 + 12= (28+12)+(40+10)=40+50=90
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22 +17+ 38 +23=(22+38)+(17+23)=60=40=100
28+ 40 + 10 + 12= (28+12)+(40+10)=40+50=90