7×(3+3÷7)=24(7 + 9) × 2 - 8 6 ÷ (5 ÷ 4 - 1)或4 ÷ (1 - (5 ÷ 6))
傻子,你算啊!
7×(3+3÷7) (7 + 9) × 2 - 8 6 ÷ (5 ÷ 4 - 1)