add
1+1+10+20+30
62
49-5
3x7
21
10/2
6
10x4-7
33
2+30
32
4-2
2
20
21/7
3
9(10+3v)-v
90+2v
100+100
200
30-4
26
10x10
100
121/11
11
2.1x3.8
7.98
900+900
1800
400-300
100
1100x10
10000
100/10
5 to the 2 power
25
1000+10000
11000
1000-901
99
11x11
121
240
3x4+2x7
26