Predict Likes and Reshares?

Algebra Level 3

Start with any positive real number $n$ .

For every like that my next problem will get, multiply $n$ by $2$ .
For every reshare that my next problem will get, multiply 1 by the number you got in step 1 that many times.
Calculate $\log _{2}$ of the number you got in step 2.
Divide by the number of reshares my next problem will get.
Subtract the number of likes my next problem will get.
Take $2$ to the power of the number you got in step 5.
Finally, subtract $n$ from the number you have.

What is the result?