Let F(x, Y) = $x ^ { 2 }$ + 2xy

Short Answer

Let f(x, y) = $x ^ { 2 }$ + 2xy + $e ^ { y }$ . Find $\frac { \partial f } { \partial y }$ .
Enter just a polynomial in x plus or minus a polynomial in $e ^ { y }$ both in standard form (do not label, no parentheses).