2 (c - 2)*(c + 3) - c
(c - 1*2)*(c + 3) - c^2
-6 + c
1*(c - 6)
-c^2 + (3.0 + c)*(-2.0 + c)
2 - c + (-2 + c)*(3 + c)
-c^2 + (-2 + c)*(3 + c)