$$$\frac{e^{- x^{2}} \sin^{2}{\left(x \right)}}{x^{2}}$$$ 的积分
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求$$$\int \frac{e^{- x^{2}} \sin^{2}{\left(x \right)}}{x^{2}}\, dx$$$。
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求$$$\int \frac{e^{- x^{2}} \sin^{2}{\left(x \right)}}{x^{2}}\, dx$$$。