Log 0.2 0.04=log 0.2 (0.2)^2=2
log 2 1/8 = log 2 (2)^-3=-3
lg 10= 1
0.3 ^ log 0.3 25 =25
2 ^ log 4 9 = 2 ^1/2*log 2 9 = 2^ log 2 3=3
10^(lg 20- lg5)=10^lg20/10^lg5=20/5=4
log 2 5+ log 2 8/5= log 2 5+ log2 8 - log2 5=3
2log2 6+log2 35/9 -log2 35= 2 (log2 2 +log2 3)+ log2 35 - log2 1/9 - log2 35= 2 + 2log2 3+log2 35 + 2 log2 3-log2 35=2 +4log2 3