7+8=
15
100-48=
52
58+45=
103
69+21=
90
142-78=
64
45+45=
10*5=
50
5*5=
25
15*4=
60
45+1=
46
70-10=
2+2=
4
400-100=
300
21+2=
23
10+12=
22
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