25 + 7 + 40 ÷ 5 - ( 10 - 5 )
( 21 x 2 ) ÷ ( 20 - 14 )
6 x 7 ÷ (6 - 4 ) - 6
6 x 5 - (7+ 8) + 2
( 7 x 5 ) - ( 17 + 11 ) ÷ 2
8 x 3 - ( 6 - 3 ) + 7
17
7
28
35
15
21
