>>31
(log_{2}(3)+log_{4}(9))(log_{3}(4)+log_{9}(2))
=(log_{2}(3)+log_{2}(9)/log_{2}(4))(log_{2}(4)/log_{2}(3)/+log_{2}(2)/log_{2}(9))
=2log_{2}(3)*(3/2log_{2}(3))
=3