(4 × (5 - 4)) × 6=24
(4 ÷ (5 - 4)) × 6=24
4 × 6 ×(5 - 4)=24
4 × 6 ÷(5 - 4)=24
6 × (5 - 4 ÷ 4)=24
6 ÷ ((5 - 4) ÷ 4)=24