28 ×
3 ÷
1 -
8 +
4 ÷
3 -
10 +
3
8 +
2 ÷
2 -
8 +
28 ×
12 ×
9 +
1
28 ×
10 +
10 ×
17 +
17 +
12 ×
3
8 +