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log9/25=log9-log25
log3²-log5²
2.0,4771 - 2.0,6990
-0,4438
b.135=27x5
log27x5=log27+log5
3.log3+log5=3.0,4771+0,6990=2,1303
c.125/81=log125-log81
log5³-log3=3.0,6990-4.0,4771
=0,1886