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⌊∫0∞e−x2 dx∫0∞e−x2cos2x dx⌋= ?\left\lfloor \frac{\displaystyle{ \int_{0}^{\infty} e^{-x^2}\, dx}}{\displaystyle{\int_{0}^{\infty} e^{-x^2} \cos 2x \, dx}}\right\rfloor= \ ? ⎣⎢⎢⎢⎢⎢∫0∞e−x2cos2xdx∫0∞e−x2dx⎦⎥⎥⎥⎥⎥= ?
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