log2 + log12 3log5 + 2log3 1/4log81 log36 - log12
3log5 + 2log3 = log (5^3*3^2)= log 1125 (1/4)log 81 = log 81^(1/4) = log 3 You do the last one. Remember log a - log b = log a/b
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