[log3（4）+log根下3（2）][log2(9)+log4(根3)]
=[2log3（2）+2log3（2）][2log2(3)+1/4log2(3)]
=4log3（2)*9/4log2(3)
=4*9/4*log3*log2(3)
=9
[log3（4）+log根下3（2）][log2(9)+log4(根3)]
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