-8(s-2)^2+3(4s-1) = -8(s^2 - 4s + 4) + 12s - 3 = -8s^2 + 32s - 32 + 12s - 3 = -8s^2 + 44s - 35
Ответ: $$-8s^2 + 44s - 35$$