ex5 lab1 LSD

def f(x):
    if x < -3:
        return 2 * x - 1
    if x == -3:
        return 0
    if x > -3:
        return 3 * x ** 2 + 6 * x - 5

if __name__ == "__main__":
    x = int(input("x="))

    print(f(x))