Decide on what substitution to use, and then evaluate the given integral using a substitution. hint [see the faq at the end of the section for advice on deciding on u, and the examples for the mechanics of doing the substitution. see example 5.] (remember to use ln(|u|) where appropriate.) 2) decide on what substitution to use, and then evaluate the given integral using a substitution. hint [see the faq at the end of the section for advice on deciding on u, and the examples for the mechanics of doing the substitution.) 3) decide on what substitution to use, and then evaluate the given integral using a substitution. hint [see the faq at the end of the section for advice on deciding on u, and the examples for the mechanics of doing the substitution.] (remember to use ln(|u|) where appropriate.)