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Simplify completely: `10 sqrt(50 x) - 7 sqrt(98 x)`

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Entry Tip: To enter an answer like `50 sqrt(19x),` you would type 50sqrt(19x).

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   x  x  √  n√  |   | (   ) π ∞ DNE
   x  √  (   ) π ∞ DNE
( ) ( ] [ ) [ ] —∞ ∞ ∪ DNE
< > ≤ ≥ or All Real Numbers DNE
log logn ln n√  | | e 
sin cos tan arcsin arccos arctan ⟨ ⟩
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