For indefinite integral: ∫ X & # 178; e ^ xdx

∫x²(e^x)dx=∫x²d(e^x)=x²(e^x)-∫(e^x)dx²=x²(e^x)-2∫x(e^x)dx=x²(e^x)-2∫xd(e^x)=x²(e^x)-2x(e^x)+2∫(e^x)dx=(x²-2x+2)(e^x)+C

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