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= 4log(5^(-2)) . (3^2)log(4^2) . 5log3^3
= -2 . 4log5 . (2/2) . 3log4 . 3 . 5log3
= -2 . 1 . 3 . 4log5 . 5log3 . 3log4
= -6
sorry kalau salah :)