3) (x) and evaluate (s . t) (-2). (s + t) (x) =

(s - t) (x) =

(s . t) (-2) =

4. Suppose that the functions q and r are defined as follows q (x) = 2x+1

r(x) = -2x^2

Find the following

(roq) (-1) =

(qor) (-1) =