3log2(x)-(log2(3)-log2(x+4))
3log2(x)−[log2(3)−log2(x+4)]=3log2(x)−log2(3)+log2(x+4)=log2(x3)−log2(3)+log2(x+4)=log2x3(x+4)3
I am not sure if that is what you wanted :/