2 q + 4*q + 4
q^2 + 4*q + 4 при q = -1/3
q^2 + 4*q + 4
(-1/3)^2 + 4*(-1/3) + 4
(-1/3)^2 + 4*(-1)/3 + 4
25/9
4.0 + q^2 + 4.0*q
4 + q*(4 + q)
2 (2 + q)