What is the integration of e^{x}(1-x^{2}) ?
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$\displaystyle \int e^x(1-x^2)dx = \int (e^x-e^xx^2)dx = \int e^x dx - \int e^xx^2dx = e^x - \int x^2e^xdx$ To calculate $\displaystyle \int x^2 e^x dx$ use integration by parts.
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