The integral is
.
Apply integral subustitution 
Consider
.
If
then
.
.
Apply derivative on each side.
\
Substitute
in the integral.


.
\
Consider
. \ \
Apply derivative on each side.
\
Subustiute
in the integral.
.
Integral formula :
.
.
Subustiute
.

Subustiute
.
.
.
.