function solve(s)
    ret = s
    if(string.match(s, "[%+%-]") ~= nil) then
        num = tonumber(string.match(s, "(%d+)[%+%-]"))
        for d in string.gmatch(s, "([%+%-]%d+)") do
            num = num + tonumber(d)
        end
        ret = tostring(num)
    end
    return ret
end
src = io.read()
pat = "(%([%d%+%-]+%))"
a = string.match(src, pat)
while(a ~= nil) do
    b = string.match(a, "%((.+)%)")
    r = solve(b)
    src = string.gsub(src, pat, r, 1)
    a = string.match(src, pat)
end
src = string.gsub(src, "%-%-", "+")
src = string.gsub(src, "%+%+", "+")
src = string.gsub(src, "%-%+", "-")
src = string.gsub(src, "%+%-", "-")
src = solve(src)
print(src)