Here the terms of the given expression can also be rounded off as`=sqrt(1280+sqrt(244+sqrt(140+sqrt(7+sqrt(76+sqrt25)))))` `=sqrt(1280+sqrt(244+sqrt(140+sqrt(7+sqrt(76+5` `=sqrt(1280+sqrt(244+sqrt(140+sqrt(7+sqrt(81)))))` `=sqrt(1280+sqrt(244+sqrt(140+sqrt(7+9))))` `=sqrt(1280+sqrt(244+sqrt(140+sqrt(16))))` `=sqrt(1280+sqrt(244+sqrt(140+4)))` `=sqrt(1280+sqrt(244+sqrt(144)))` `=sqrt(1280+sqrt(244+12))` `=sqrt(1280+sqrt(256))` `=sqrt(1280+16)` `=sqrt1296=36` ``
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