Some hints

Inverse functions:

^ in general

Change of base rule:

Addition Rule:

Subtraction Rule:

Power Law:

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For example number 2 (I apologise if I have misread the question but the syntax is highly confusing)

From the change of base rule applied to each term (I have used base but it works with any positive base that is not 1):

since and we can simplify using the power law

Cancel out terms as you would with any ordinary fraction to give an answer of