import fileinput


def solve(line):
    if line[0].isdigit():
        if len(line) == 1:
            return int(line[0])
        if len(line) == 3 and line[1] == '+':
            return int(line[0]) + int(line[2])
        if len(line) == 3 and line[1] == '*':
            return int(line[0]) * int(line[2])
        if line[1] == '+':
            if line[2] == '(':
                depth = 1
                for i, c in enumerate(line[3:]):
                    if c == '(':
                        depth += 1
                    if c == ')':
                        depth -= 1
                    if depth == 0:
                        break

                inner = int(line[0]) + solve(line[3:i+3])
                return solve([str(inner)] + line[i+4:])
            else:
                v = solve(line[:3])
                return solve([str(v)] + line[3:])
        if line[1] == '*':
            return solve(line[:1]) * solve(line[2:])
        raise BaseException(f"HELP {repr(line)}")


    if line[0] == '(':
        depth = 1
        for i, c in enumerate(line[1:]):
            if c == '(':
                depth += 1
            if c == ')':
                depth -= 1
            if depth == 0:
                break

        inner = str(solve(line[1:i+1]))
        return solve([inner] + line[i+2:])

summ = 0
for line in fileinput.input():
    line = line.replace(" ", "").strip()
    v = solve(list(line))
    print(line, v)
    summ += v
print(summ)