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= ³log 9.5 - ³log 5^2 + 3^2 log 25.3
= ³log 9 + ³log 5 - 2 ³log 5 + 3^2 log 5^2 + 3^3 log 3
= ³log 3^2 + ³log 5 - 2 ³log 5 + (2/2) ³log 5 + (1/2) ³log 3
= 2 ³log 3 + ³log 5 - 2 ³log5 + (2/2) ³log 5 + (1/2) ³log 3
= 2 + (1-2+1) ³log 5 + (1/2)
= 2 + 1/2
= 5/2