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Find the sum.

`(57 x^5 + 40 x^3 + 18)+(-53 x^5 -54 x^3 -3)` =  

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( ) ( ] [ ) [ ] —∞ ∞ ∪ DNE
< > ≤ ≥ or All Real Numbers DNE
log logn ln n√  | | e 
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