120: [54 - [ 50 :2 - (3²-2.4 ) ] }
= 120:{54-[50:2-(9-8)]}
= 120:[54-(25-1)]
= 120:(54-24)
= 120:30
= 4
120 : {54 - [50 : 2 - (3² - 2.4)]}
= 120 : {54 - [25 - (9 - 8)]}
= 120 : [54 - (25 - 1)]
= 120 : (54 - 24)
= 120 : 30
= 4
`120 : {54 - [50 : 2 -(3^2 - 2 . 4)]}`
`= 120 : {54 - [25 - (9-8)]}`
`= 120 : {54 - [25-1]}`
`= 120 : {54 - 24}`
`=120:30`
`= 4`