math a
1+1
2
5+5
10
9+9
18
13+13
26
17+17
34
2+2
4
6+6
12
10+10
20
14+14
28
18+18
36
3+3
6
7+7
14
11+11
22
15+15
30
19+19
38
4+4
8
8+8
16
12+12
24
16+16
32
20+20
40
123,456,789+987,654,321
1,111,111,110
12,345x12,345
152,399,025
2371x1632
3,869,472
987,654,321+234,567,890
1,222,222,221
1x1
1