exam Maths Puzzle Numerical Ability

Simplify the expression; make sure the answer has no negative exponents:
(6r^-1)^2 (2r^-4) divided by r^-5 (r^2)^-3

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exam Other Question

I cannot figure out how to rewrite this logarithm as one simplified logarithm

log(6x)+5log(3x)-3log(9x)

Please help.

xandra the sum of two consecutive integers is 49.find the two integers