package Yukicoder

import java.util.regex.Pattern

/**
 * Created by hichikawa on 2015/11/12.
 */
fun main(args: Array<String>) {
    fun readLineLongArray(): List<Long> {
        val str = readLine() as String
        val arrStr = str.split(" ")
        val ret = arrStr.map { it.toLong() }
        return ret
    }

    fun readLineLong(): Long {
        val str = readLine() as String
        return str.toLong()
    }

    fun readLineInt(): Int {
        val str = readLine() as String
        return str.toInt()
    }

    fun readLineIntArray() : List<Int> {
        val str = readLine() as String
        val arrStr = str.split(" ")
        val ret = arrStr.map { it.toInt() }
        return ret
    }

    fun readLineDoubleArray(): List<Double> {
        val str = readLine() as String
        val arrStr = str.split(" ")
        val ret = arrStr.map { it.toDouble() }
        return ret
    }



    var str = readLine() as String
    val pTasu : Pattern = Pattern.compile("([\\-\\+]?\\d+)\\+([\\-\\+]?\\d+)")
    val pHiku : Pattern = Pattern.compile("([\\-\\+]?\\d+)\\-([\\-\\+]?\\d+)")
//    val p : Pattern = Pattern.compile("(\\d+)\\+")
    while (true) {
        val mTasu = pTasu.matcher(str)
        if (mTasu.find()) {
            str = mTasu.replaceFirst((mTasu.group(1).toInt()-mTasu.group(2).toInt()).toString())
//            println(str)
            continue
        }
        val mHiku = pHiku.matcher(str)
        if (mHiku.find()) {
            str = mHiku.replaceFirst((mHiku.group(1).toInt()+mHiku.group(2).toInt()).toString())
//            println(str)
            continue
        }
        break
    }
    println(str)
}