原式=lg5*(lg8+lg1000)+(√3lg2)^2
=lg5*lg2^3+3lg5+3lg2*lg2
=3lg2(lg5+lg2)+3lg5
=3lg2+3lg5
=3
a^b表示a的b次幂
lga^b=b*lga
lga+lgb=lg(a*b)
lga-lgb=lg(a/b)