-x - 2 + 15*x
-x - 2 + 15*x при x = 3/2
-(3/2) - 2 + 15*(3/2)
-3/2 - 2 + 15*3/2
19
-2 + 14*x
-2.0 + 14.0*x
2*(-1 + 7*x)