(1) Log300=log(3*4*25)=log3+log4+log25=log3+log(2*2)+log(5*5)=log3+2log2+2log5.
(2) Log60=log(2*2)+log(3)+log(5)=2log2+log3+log5.
(3) Log(64)-log(128)+log(32)=log(2*2*2*2*2*2)-log(2*2*2*2*2*2*2)+log(2*2*2*2*2)=6log2-7log2+5log2=log2(6-7+5)=4log2=log(2*2*2*2)=log(16).