16−17= 5+15= 910−14= 15+16= 1−34−14=
1- 913 = 1112−512= 45+13= 6- 53 = 411+511+211=
45+34=
1﹣37=
1924+524=
57−18+27=
42=
511−411=
38﹣0.375=
112+13=
1﹣712﹣512=
4+4+4=
45+35=
17+15=
13−19=
14+12=
1−914=
45−45=
16−17=
12−510=