addition
5+2
7
7x2
14
5-2
3
2+a=
a=13
15
10 divided by 2
5
10+25
35
7x4
28
10-13
-3
a=21,b=13
a2+b=
55
20 divided by 10
2
20+55
75
30x5
150
25 - 2.5
22.5
z=13, b=10.5
z+b2
34
21 divided by 3
7
53+9.5
62.5
12.5x6
75
55- 27
28
b=9
bx2
18
33 divided by 12
2.75
110+223
333
33x9
297
1324- 1111
213
a=12.5
b=13
axb
162.5
550 divide by 3
183.33333333