The functions are and .

Find .

Apply composition of functions formula: .

To find , evaluate , first. Then use the range as the domain of and evaluate .

                          ()

is undefined.

or                   ()

or                       ()

                            ()

is undefined.

Because and are not in the domain of , is undefined for and .

or , or .

Therefore, .

Find .

Apply composition of functions formula: .

To find , evaluate first. Then use the range as the domain of and evaluate .

or                  ()

or                     ()

or                   ()

                           ()

is undefined.

Because is not in the domain of , is undefined for .

or , or , or .

Therefore, .

and .