Letu=e^{6x}+ 9. Thendu= 6e^{6x}dxande^{6x}dx=

1 6 du, so

=

e^{6x}e^{6x}+ 9dx =

1 u

1 6 du

ln|

1 6 u| +C=ln(

1 6 e^{6x}+ 9) +C.

Is this correct?

edit: my syntax is messed up sorry I will fix