The functions are .

a) (f + g)(x)

                (Substitute f(x) =  and g(x) = )

                             (Add: )

b) (f g)(x)

                (Substitute f(x) =  and g(x) = )

                             (Add: 3 + 4 = 7)

c)

                 (Substitute f(x) = and g(x) =)

  (Using FOIL method)

d)

                                (Substitute f(x) =  and g(x) = )

The solutions are ,

.