Log1/6 (log5 49 * log7 125)
Log1/6_(log5_49 * log7_125) = =log1/6_( 2*log5_7 * 3 log7_5) = log1/6_(6* log5_7 * 1/log5/7)= =log1/6_(6*1) = log1/6_(6) = - log6_(6) = - 1