Для a = -3:

3(2(-3) - 7) - 1 = 3(-6 - 7) - 1 = 3(-13) - 1 = -39 - 1 = -40

5(4 + 2(-3)) + 4(9(-3) + 6) = 5(4 - 6) + 4(-27 + 6) = 5(-2) + 4(-21) = -10 - 84 = -94

Ответ: -40, -94