How do I import text string as numeric in R?

I have created a spreadsheet in Excel with concatenate in order to make things easier for later use. Now I want to evaluate the text strings. Doing it in Excel sounds harder than doing it in R. Therefore, I was wondering how to import and evaluate in R. Instead of what I want, I get text strings like the following.

     Air.Force.Falcons           Akron.Zips Alabama.Crimson.Tide
1       -.8*2-(1-.8)*1 -.5*0+(0)*(2*.8-1)/2 -.5*0+(0)*(2*.8-1)/2
2 -.5*0+(0)*(2*.8-1)/2       -.8*2-(1-.8)*1 -.5*0+(0)*(2*.8-1)/2
3 -.5*0+(0)*(2*.8-1)/2 -.5*0+(0)*(2*.8-1)/2       -.8*0-(1-.8)*2
4 -.5*0+(0)*(2*.8-1)/2 -.5*0+(0)*(2*.8-1)/2 -.5*0+(0)*(2*.8-1)/2
5 -.5*0+(0)*(2*.8-1)/2 -.5*0+(0)*(2*.8-1)/2 -.5*0+(0)*(2*.8-1)/2
6 -.5*0+(0)*(2*.8-1)/2 -.5*0+(0)*(2*.8-1)/2 -.5*0+(0)*(2*.8-1)/2
7 -.5*0+(0)*(2*.8-1)/2 -.5*0+(0)*(2*.8-1)/2 -.5*0+(0)*(2*.8-1)/2

How do I import them as numeric or evaluate them as numeric after the fact? I've tried as.numeric and colClasses="numeric". To recreate this, simply make a spreadsheet with formulas like =concatenate("-5*3"). How do I reverse this? Thanks.

Link to output of dput(head(week15_90)) https://docs.google.com/document/d/1xCVjSff6f055PX8qEnVLh49V6TYXFQeZZzc3bofG5z4/edit?usp=sharing