计算:{(2/3x²)-2/(x²+y²)【(x²+y²/3x²)-x²-y计算:{(2/3x²)-2/(x²+y²)【(x²+y²/3x²)-x²-y²)】}÷(x²-y²)/x²
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![计算:{(2/3x²)-2/(x²+y²)【(x²+y²/3x²)-x²-y计算:{(2/3x²)-2/(x²+y²)【(x²+y²/3x²)-x²-y²)】}÷(x²-y²)/x²](/uploads/image/z/3758024-56-4.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A%7B%EF%BC%882%2F3x%26%23178%3B%EF%BC%89-2%2F%EF%BC%88x%26%23178%3B%2By%26%23178%3B%EF%BC%89%E3%80%90%28x%26%23178%3B%2By%26%23178%3B%2F3x%26%23178%3B%EF%BC%89-x%26%23178%3B-y%E8%AE%A1%E7%AE%97%EF%BC%9A%7B%EF%BC%882%2F3x%26%23178%3B%EF%BC%89-2%2F%EF%BC%88x%26%23178%3B%2By%26%23178%3B%EF%BC%89%E3%80%90%28x%26%23178%3B%2By%26%23178%3B%2F3x%26%23178%3B%EF%BC%89-x%26%23178%3B-y%26%23178%3B%29%E3%80%91%7D%C3%B7%EF%BC%88x%26%23178%3B-y%26%23178%3B%EF%BC%89%2Fx%26%23178%3B)
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