Evaluate the integral
dx(6x+8)2\displaystyle \int{\frac{{{\left.{d}{x}\right.}}}{{{\left({6}{x}+{8}\right)}^{{2}}}}},
by making the appropriate substitution: u = 
 

dx(6x+8)2\displaystyle \int{\frac{{{\left.{d}{x}\right.}}}{{{\left({6}{x}+{8}\right)}^{{2}}}}} =