10+10
20
23-5
18
5*3
15
23+32
55
56-40
16
23*5
115
143+63
206
100-54
46
12*10
120
234+43
277
124-75
49
13*14
182
1242+1439
2681
345-234
111
5*8*1*6
240
Press F11 Select menu option View > Enter Fullscreen for full-screen mode