6 [ 4 × ( 72 - 63 ) ÷ 3 ]
Do parenthesis first. 72 - 63 = 9, simplifies to: 6 [ 4 (9) ÷ 3]multiply 9 and 4, which is 36, divide that by 3, which equals, 126 [12]126 = 72
6((4(72-63)/3))6((49/3))6((36/3))6((12))72
