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Given `f(x,y) = 5 x^2 -5 x^2 y^4 -3 y^3`, find

`f_(x)(x,y)` =  

`f_(y)(x,y)` =  

`f_(x x)(x,y)` =  

`f_(x y)(x,y)` =  

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   x  x  √  n√  |   | (   ) π ∞ DNE
   x  √  (   ) π ∞ DNE
( ) ( ] [ ) [ ] —∞ ∞ ∪ DNE
< > ≤ ≥ or All Real Numbers DNE
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