Answer
$$= 4p^3 +3q^2 -q$$
Work Step by Step
Like terms must (1) be raised to the same power and (2) consist of the same variable (i.e. x and y are not like terms). It is also important to note that numbers are all like terms with each other when not multiplied by anything. Thus, combining like terms, we obtain:
$$ =(1+3)p^3 + 3q^2 - q \\ = 4p^3 +3q^2 -q$$
