module Main where
import Control.Monad
import Control.Applicative
import Data.Maybe
import Data.List
import qualified Text.Printf
import qualified Data.ByteString.Char8 as BC
import qualified Data.ByteString as BC

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main :: IO ()
main = do
  x:xs <- (map read <$> map (:[]) <$> getLine) :: IO [Int]
  let f a (x, s) = [(x+a, s ++ "+" ++ show a), (x-a, s ++ "-" ++ show a)]
      (_, ans) = head $ filter ((==) 7 . fst) $ foldl' (>>=) [(x, show x)] $ map f xs
  putStrLn $ ans ++ "=7"

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{- Int input -}

parseInt :: BC.ByteString -> Int
parseInt = fst . fromJust . BC.readInt

parseInts :: BC.ByteString -> [Int]
parseInts = map parseInt <$> BC.words

readInt :: IO Int
readInt = parseInt <$> BC.getLine

readInts :: IO [Int]
readInts = parseInts <$> BC.getLine

{- Double Formatting -}

doubleFmt :: Double -> String
doubleFmt = Text.Printf.printf "%.12f"
