(-c - 3)*(c + 1)
(-c - 1*3)*(c + 1)
1*(c + 3)*(c + 1)
(1*(c + 3))*(c + 1)
-(1 + c)*(3 + c)
2 -3 - c - 4*c
-3 - c^2 - 4*c
(1.0 + c)*(-3.0 - c)