152312 : {1930 - [2 . 9 + 1969 - (19 . 5 + 1890)]}
= 152312 : {1930 - [18 + 1969 - (95 + 1890)]}
= 152312 : {1930 - [18 + 1969 - 1985]
= 152312 : {1930 - [1987 - 1985]}
= 152312 : {1930 - 2}
= 152312 : 1928
= 79
152312 : { 1930 - [ 2 * 9 + 1969 - ( 19 * 5 + 1890 )
= 152312 : { 1930 - [ 2 * 9 + 1969 - ( 95 + 1890 )
= 152312 : { 1930 - [ 2 * 9 + 1969 - 1985 ]
= 152312 : { 1930 - [ 18 + 1969 -1985 ]
= 152312 : { 1930 - [ 1987 - 1985 ]
= 152312 : { 1930 - 2 }
= 152312 : 1928
= 79
~ Học tốt ~
152312 : {1930 - [2 . 9 + 1969 - (19 . 5 + 1890)]}
= 152312 : {1930 - [18 + 1969 - (95 + 1890)]}
= 152312 : {1930 - [18 + 1969 - 1985]
= 152312 : {1930 - [1987 - 1985]}
= 152312 : {1930 - 2}
= 152312 : 1928
= 79