=45:(390:(5*100-(125+49*5)
=45:(390:(500-(125+245)
=45:(390:(500-370)
=45:(390:130)
=45:3
=15
tick nhé
45 : ( 390 : ( 5 x 102 - ( 53 + 72 x 5 )))
=45 : ( 390 : ( 5 x 100 - ( 125+ 49 x 5 )))
=45 : ( 390 : ( 5 x 100 - (125+245)))
=45 : ( 390 : ( 5 x 100 - 370))
=45 : ( 390 : (500-370))
=45:(390:130)
=45:3
=15