$$$9 x^{2} \sin{\left(x \right)} - 4 x \sin^{2}{\left(x \right)}$$$ 的积分

该计算器将求出$$$9 x^{2} \sin{\left(x \right)} - 4 x \sin^{2}{\left(x \right)}$$$的积分/原函数，并显示步骤。

求$$$\int \left(9 x^{2} \sin{\left(x \right)} - 4 x \sin^{2}{\left(x \right)}\right)\, dx$$$。

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