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Step-by-step explanation:
The question asked is
We will do prime factorisation of all the radicals (roots) here.
We will remove the pair of 11 and write 11 outside the radical
We will remove the pair of 5 and write 5 outside the radical
We will remove the pair of 7 and write 7 outside the radical
Now we have
which is
Since all three numbers have the same radical, we can add them
which comes out as
Hence the answer
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