log5(35)+2log1/2(√2)-log5(1/50)-log5(14)
=log5(35)-log5(1/50)-log5(14)+2log1/2(√2)
=log5(35×50×(1/14))+2×(1/2)log1/2(2)
=log5(5^3)+log1/2((1/2^(-1))
=3-1
=2