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Omni-MATH / Find all functions f:R→R such that for any two real numbers x,y holds f(xf(y)+2y)=f(xy)+xf(y)+f(f(y)). · Discussion

Discussing Find all functions f:R→R such that for any two real numbers x,y holds f(xf(y)+2y)=f(xy)+xf(y)+f(f(y)). · Omni-MATH

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