pain. please send help, i swear this is the first time i've ever seen this in my life, i can't believe this isn't on stack overflow, i'm getting scammed, help me please, i have children whos lives depend on this, i can't let them down, please 
2+3=d
#> Error in eval(expr, envir, enclos): object 'd' not found
Created on 2021-06-15 by the reprex package (v2.0.0)