Log2 x 4 x log2 x2 5. Log5 2 2 x log5 x 3 log5 x 3 x2. log2 x-1 10+3x-x 2 log2 7-x 5. log 2 3 25-x 2 -3log3 25-x 2 +2. log4(x+1)-lg(x+1)lg(1-x)-log25(1-x)<log4(25).

Log2 x 4 x log2 x2 5. Log5 2 2 x log5 x 3 log5 x 3 x2. log2 x-1 10+3x-x 2 log2 7-x 5. log 2 3 25-x 2 -3log3 25-x 2 +2. log4(x+1)-lg(x+1)lg(1-x)-log25(1-x)<log4(25).
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