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-- increment, add, func args

incr :: Int -> Int
incr n = n + 1

add :: Int -> Int -> Int
add m n = m + n

addBeforeFunc :: (Int -> Int) -> Int -> Int -> Int
addBeforeFunc f m n = add (f m) (f n)

main :: IO()
main = do
    let x = 10
    let y = 30
    print $ addBeforeFunc incr x y