# -*- encoding: utf-8 -*-
import re


def multiply_divide(exp):
    if '/' in exp:
        a, b = exp.split('/')
        return str(float(a)/float(b))
    if '*' in exp:
        a, b = exp.split('*')
        return str(float(a)*float(b))


def deal_with(expr):
    expr = expr.replace('++', '+')
    expr = expr.replace('+-', '-')
    expr = expr.replace('--', '+')
    expr = expr.replace('-+', '-')
    return expr


def add(expr):
    ret = re.findall('-?\d+\.?\d?', expr)
    sum = 0
    for i in ret:
        sum += float(i)
    return str(sum)


def expr_no_bracket(expr):
    expr = expr.strip('()')
    # print(expr)
    # 计算
    while 1:
        ret = re.search('\d+\.?\d*[*/]-?\d+\.?\d*', expr)
        if ret:
            expr_son = ret.group()
            # print(expr_son)
            new_expr = multiply_divide(expr_son)
            expr = expr.replace(expr_son, new_expr)

        else:
            expr = add(expr)
            return expr
            # break


expression = '1 - 2 * ( (60-30 +(6-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4*3)/ (16-3*2) )'
expression = expression.replace(' ', '')
print(expression)
while 1:
    ret = re.search('\([^()]+\)', expression)
    if ret:
        expr_brackets = ret.group()
        print(expr_brackets)
        new_exp = expr_no_bracket(expr_brackets)
        expression = expression.replace(expr_brackets, new_exp)
        expression = deal_with(expression)
        print(new_exp)
        print(expression)
    else:
        break