Hi there @Deena_20,
I’ve moved your question to the “Optimization (Mathematical)” section. If you have JuMP questions in future, that’s the place to put them 
Since this is your first post, you should also take a read of: Please read: make it easier to help you. It explains how you can format your code to make it easier to read.
What is the contents of Book2.csv? df2[h,i,j,k,p] is a vector, but it looks like it only has one element, so perhaps you meant eval(Meta.parse(df[1,2]))?
In general though, what are you trying to achieve? Storing nonlinear expressions as text and then trying to parse them into JuMP is quite tricky, and there are a number of things that could go wrong. There might be a different approach you could take that doesn’t involve using eval.