How to use division in constraints

Here is the Question:

max  D0(Dr+Dt)
s.t. (2^γt − 1)(a*Dt/βt + pr) ≤ pt,
(2^γr − 1)b*Dr/βr ≤ pr, 
βr ≤ 2^γt*(2^γr − 1)/(2γt − 1)*βt, 

You haven’t told us which are the optimization variables are and which are input data. Nor have you told us the sign of the items in the denominators. Some possibilities might include use of inv_pos, and multiplying through a denominator.

But the first thing for you to do is to make sure your problem is convex.