Question 536205
You problem statement is not clear.  To format the equation, you need to put three opening braces in front and three closing braces in back.  To get the "sqrt" function to work, you have to put whatever is under the radical inside parentheses.
.
{{{ (4) sqrt 2x / (4) sqrt 125y^11 }}}
.
I think you may mean:
.
{{{
(4*sqrt(2x)) / (4*sqrt(125*y^11))
}}}
.
The 4's cancel.
.
{{{ sqrt(125*y^11) = sqrt(5*25*y^10*y) = 5y^5*sqrt(5y) }}}
.

{{{
(4*sqrt(2x)) / (4*sqrt(125*y^11)) = (sqrt(2x)) / (5y^5*sqrt(5y))
}}}