First, simplify the terms in the numerator of the fraction.
5√80=5√8080=5⋅4√580=√54
√8459=13√59
√45=3√5
The numerator then becomes
√54+13√59+3√5
Since the denominator contains √5, we can just divide that from the numerator:
14+139+3=16936
Now, just take the square root of that to get the final answer:
√16936=√169√36=136
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