2log3*7log5/(2/7)log3*24log5=49/24
log3^2*log5^7/log9^1/7*log125^8
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(log3 4+log3 8)(log2 3+log2 9)+(log3 根号2)(log9 7)/(log1/3 7)
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(log(2)125+log(2)25+log(8)5)*(log(125)2+log(25)4+log(5)8)
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log7（1/8) * (log8 （25）+log2 （5）)* log5 （49） 怎么求
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化简1/log 7+1/log 7+1/log 7 5 3 2