Question 60475
Multiplying the log of x by 5 is the same as finding the log of x^5.
Multiplying the log of y by 7 is the same as finding the log of y^7.

Subtracting the logs is the same as finding the log of (the first number divided by the second number)

ie
{{{5 logb x-7 logb Y = logb (x^5/y^7)}}}