adding
5+5
10
5-3
2
5x5
25
10d5
2
5d2
2.5
20+25
45
10-7
3
10x5
50
20d5
4
15-9
6
40+100
140
100-50
50
25x4
100
42d4
10.5
300+500
800
200+300
500
400-100
300
99x9
891
50d8
6.25
55x5
275
1000+4050
5050
4000-3000
1000
100x20
2000
100d40
2.5
900-200
700