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