算 2log3 2-log32/9+log3 8-5^2log5 3 .

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算2log32-log32/9+log38-5^2log53.算2log32-log32/9+log38-5^2log53.算2log32-log32/9+log38-5^2log53.log32/9

算 2log3 2-log32/9+log3 8-5^2log5 3 .
算 2log3 2-log32/9+log3 8-5^2log5 3 .

算 2log3 2-log32/9+log3 8-5^2log5 3 .
log3 2/9=log3 2-log3 9=log3 2-2
log3 8=3log3 2
5^2log5 3=5^log5 9=9
所以2log3 2-log32/9+log3 8-5^2log5 3=4log3 2 - 7