log2 SQR(7/48)+log2 12 -1/2log2 48=0.5log2 7+0.5log2 48+log2 12 -1/2log2 48=0.5log2 7+log2 12 =log2 1008
log2 SQR(7/48)+log2 12 -1/2log2 48
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