Change of double integral order

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$$\int_{-\infty}^{\infty} \int_{-\infty}^{\infty} f(x,y)\ dx\ dy= \int_{-\infty}^{\infty} \int_{-\infty}^{\infty} f(x,y)\ dy\ dx$$

Can we freely change the order of double indefinite integrals? Could you provide proof?