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Question
Evaluate `int (1 + x + x^2/(2!))`dx
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Solution
`int (1 + x + x^2/(2!))`dx
`= int 1 dx + int x dx + 1/(2!) int x^2 dx`
`= x + x^2/2 + 1/(2!) xx x^3/3 + c`
∴ `x + x^2/2 + x^3/6 + c`
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