1/2(lg2)^2+1/2lg2*lg5+√1/4(lg2)^2-lg2+1 =(1/2)(lg2)(lg2+lg5)+√[﹙lg2)/2-1] =(1/2)(lg2)+1-(lg2)/2=1
1/2(lg2)^2+1/2lg2*lg5+√1/4(lg2)^2-lg2+1=?
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