(7)2*9+(7-1)
(8)9/3*(1+7)
(9)(2 × 7 - 6) × 3
(10)2 × 9 - 2 + 8
(11)(1 × 2 + 6) × 3
(12) 5 × (5 - 1 ÷ 5)
(13)(2 - 5 + 7) × 6
(14)(3 + 9 ÷ 5) × 5
(15)(6 × (6 - 1)) - 6
(16)10 - 6 + 10 + 10
(17)3 - 7 ×(7 - 10)
(18)1 × 6 ×(7 - 3)
(19)2 × (2 + 2 × 5)
(20)2 × (2 × 7 - 2)
(21)3 × 3 + 3 × 5
(22)6 + 6 ×(6 - 3)
(23)6 × (6 + 6 - 8)
(24)2 × 4 + 7 + 9
(25)(10 × 10 - 4) ÷ 4
(26)(4 + 9 - 10) × 8