45+16+28= 80-15-27=
34+61-48= 78-56+14=
100-34-25= 90-(42+19)=
38+29= 71-32= 15+47+29=
9+52= 90-76= 72-(18+46)=
17+28+46=
90﹣24﹣38=
43+39﹣57=