При c = -2:
C-(2C-(3C+1))
= -2 - (2(-2) - (3(-2) + 1))
= -2 - (-4 + (-6) + 1)
= -2 - (-4 - 6 + 1)
= -2 - (-9)
= -2 + 9
= 7

При c = 1:
C-(2C-(3C+1))
= 1 - (21 - (31 + 1))
= 1 - (2 - (3 + 1))
= 1 - (2 - 4)
= 1 - (-2)
= 3