2020 OIM Problems/Problem 5
Problem
Find all functions 
such that
![\[f(xf(x-y))+yf(x)=x+y+f(x^2)\]](http://latex.artofproblemsolving.com/c/c/1/cc1bb6eeea93502ff2cd051a064796b431cf3eaa.png)
for any real numbers 
.
~translated into English by Tomas Diaz. ~orders@tomasdiaz.com
Solution
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