√(5^5/5^4·8 + 3^2) + √(5^2/(18 + 7))=
=√(5·8 + 9) + √(25/25)=
=√49 + √1= 7 + 1 = 8
129)
$\small \sqrt{\left(5^5 : 5^4\right)·8+3^2}+\sqrt{5^2 : (18+7)}=$
$\small =\sqrt{\left(5^{5-4}\right)·8+9}+\sqrt{25 : 25}=$
$\small =\sqrt{5^1·8+9}+\sqrt{1}=$
$\small =\sqrt{5·8+9}+1=$
$\small =\sqrt{40+9}+1=$
$\small =\sqrt{49}+1=$
$\small =\sqrt{49}+1= 7+1 = 8$