Integrate the following functions using substitution. (Do not forget +C)

 $\displaystyle \int{\left({x}^{{2}}-{7}\right)}^{{{6}}}{2}{x}{\left.{d}{x}\right.}=$ Preview Question 6 Part 1 of 3  

 

$\displaystyle \int{x}^{{3}}{e}^{{{x}^{{4}}}}{\left.{d}{x}\right.}=$ Preview Question 6 Part 2 of 3  

 

 $\displaystyle \int{\left({\ln{{x}}}\right)}^{{{7}}}\frac{{1}}{{x}}{\left.{d}{x}\right.}=$ Preview Question 6 Part 3 of 3