Question 903885
You're very close. In the numerator, you are really dividing all that mess by {{{root(15,x^19)}}}


Put another way, you are multiplying the whole numerator by {{{x^(-19/15)^""}}}


So you *should* have


[ Numerator ]*( x^(-19/15) )


Meaning that you distribute x^(-19/15) to the two terms inside the numerator. You only multiplied {{{ (root( 15, x^2 )^2 * x )}}} by {{{x^(-19/15)^""}}}, 


but forgot to multiply the first term {{{(root( 5, x ) * x^2 * x^(1/3)^"" )}}} by x^(-19/15).


If you do that step, you will get the answer {{{root(15,x^19) - 1}}}


Hope that helps. If not, then let me know.