Question 940953
<pre>
{{{int((sqrt(x)-1)^6/sqrt(x),dx)}}}

{{{matrix(1,4,Let, sqrt(x),""="",u)}}}  

{{{matrix(1,8,Then,x,""="",u^2, and, dx,""="",2u*dx )}}}

{{{int((sqrt(x)-1)^6/sqrt(x),dx)}}}{{{""=""}}}{{{int((u-1)^6/u,""*2u*du)}}}{{{""=""}}}{{{int((u-1)^6/cross(u),""*2cross(u)*du)}}}{{{""=""}}}

{{{int((u-1)^6,""*2du)}}}{{{""=""}}}{{{2int((u-1)^6,du)}}}{{{""=""}}}{{{2(u-1)^7/7}}}{{{""+""}}}{{{C}}}{{{""=""}}}

{{{2(sqrt(x)-1)^7/7}}}{{{""+""}}}{{{C}}}

Edwin</pre>