（2lg5^2+log5^3)/(log5^10+0.5log5^0.36+1/3log5^8)
=5lg5/(10+0.18＋8/3）log5
=5/(10+0.18＋8/3）
自己化简吧
计算（2lg5^2+log5^3)/(log5^10+0.5log5^0.36+1/3log5^8)
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