S = io.read()
S=S:gsub("%s+","")
S=S:gsub("[^-+*/^()]+","v(\"%1\")")

S=S:gsub("([^)])%+v","%1~v")
S=S:gsub("^%+v","~v")
mt={}
function mt.__add(a,b)
    local u={cpf=a.cpf.." "..b.cpf.." +"}
    setmetatable (u, mt)
    return u
end

function mt.__sub(a,b)
    local u={cpf=a.cpf.." "..b.cpf.." -"}
    setmetatable (u, mt)
    return u
end

function mt.__mul(a,b)
    local u={cpf=a.cpf.." "..b.cpf.." *"}
    setmetatable (u, mt)
    return u
end

function mt.__div(a,b)
    local u={cpf=a.cpf.." "..b.cpf.." /"}
    setmetatable (u, mt)
    return u
end

function mt.__pow(a,b)
    local u={cpf=a.cpf.." "..b.cpf.." ^"}
    setmetatable (u, mt)
    return u
end

function mt.__unm(a)
    local u={cpf=a.cpf.." @-"}
    setmetatable (u, mt)
    return u
end

function mt.__bnot(a)
    local u={cpf=a.cpf.." @+"}
    setmetatable (u, mt)
    return u
end

function v(x)
    local u={cpf=x}
    setmetatable (u, mt)
    return u
end

io.stderr:write(S.."\n")

r=load("return "..S)()
print(r.cpf)