# -*- coding:utf-8 -*-
import re
express = '1 - 2 * (( 6 0 -30 + (-40/5) * (9-2*5/3 +7 /3 *99/4*2998 +10 *568/14)) -(-4*3)/(16-3*2))'

def dealwith(express):
    #处理表达式中的符号+- - -- +
    express=express.replace('+-','--')
    express=express.replace('--','+')
    return express
def cal_exp_son(exp_son):
    #只用来计算原子型的表达式/子表达式(最简单的*/法)
    if '/' in exp_son:
        a,b = exp_son.split('/')
        return str(float(a)/float(b))
    elif "*" in exp_son:
        a,b = exp_son.split("*")
        return str(float(a)*float(b))
def cal_express_no_bracket(exp):
    #计算没有括号的表达式
    #exp:没有经过处理的最内层带()的表达式
    exp = exp.strip("()")
    print(exp)
    #先乘除后+-
    while True:
        ret = re.search('\d+\.?\d*[*/]-?\d+\.?\d*',exp)
        if ret: #表达式中还有*/法
            exp_son = ret.group() #子表达式(最简单的*/法)
            print(exp_son)
            ret = cal_exp_son(exp_son)
            #print(ret)
            exp =  exp.replace(exp_son,ret)
            exp = dealwith(exp)
        else: #说明表达式中没有/*了
            ret = re.findall("-?\d+\.?\d*",exp)
            for i in ret:
                sum = 0
                sum += float(i)
                return  str(sum)
new_express = express.replace(' ','')
print(new_express)
while True:
    ret = re.search('\([^()]+\)',new_express)
    if ret:
        express_no_bracket = ret.group()
        print(express_no_bracket)
        ret = cal_express_no_bracket(express_no_bracket)
        print(new_express,express_no_bracket,ret)
        new_express = new_express.replace(express_no_bracket,ret)
        print(new_express)
        new_express = dealwith(new_express) #处理+- --
        print(new_express)
    else:
        print(new_express)
        print("表达式中已经没有()",new_express)
        ret = cal_express_no_bracket(new_express)
        print(ret)
        break