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3^2 log 5^2 . 5 log 2 - 3 log 54
= (2/2) 3 log 5 . 5 log 2 - (3 log 3^3.2)
= 3 log 5. 5 log 2 - ( 3. 3 log 3 + 3 log 2 )
= 3 log 2 - 3 - 3 log 2
= -3