def only_numbers(s):
    n = 0
    d = 1
    for c in s:
        if c.isdigit():
            n += int(c) * d
            d *= 10
        else:
            break
    return n

def pre_letter_number(c, s):
    n = 0
    d = 1
    for i in range(len(s)):
        if s[i].isdigit():
            n += int(s[i]) * d
            d *= 10
        elif s[i] == '^':
            break
    return n
def post_letter_number(c, s):
    n = 0
    d = 1
    start = 0
    for i in range(len(s)):
        if s[i] == '^':
            start = 1
    for i in range(start, len(s)):
        if s[i].isdigit():
            n += int(s[i]) * d
            d *= 10
    return n

def product_contains(c, s):
    for x in s:
        if (x == c):
            return True
    return False

def polynom(s, x):
    signs = []
    if s[0] != '-':
        signs.append(1)
    for c in s:
        if c == '-':
            signs.append(-1)
        elif c == '+':
            signs.append(1)
    a = s.replace('-', '+').split('+')
    if a[0] == '':
        del a[0]
    sum = []
    for i in range(len(a)):
        if product_contains('x', a[i]):
            for j in range(len(a[i])):
                if product_contains('^', a[i]):
                    sum.append((x * pre_letter_number('x', a[i]))**post_letter_number('^', a[i]))
                    break
                else:
                    sum.append(x * pre_letter_number('x', a[i]))
                    break
        else:
            sum.append(only_numbers(a[i]))
            break
    answer = 0
    for i in range(len(sum)):
        answer += sum[i] * signs[i]
    return answer

s = input()
print(polynom(s, 3))