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int (ax^2+bx+c)dx =...

`int (ax^2+bx+c)dx` =

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`int ax^(2) +bx+c) dx`
`=a int x^(2) dx+b int x dx +c int 1.dx`
`=(ax^(3))/(3) +(bx^(3))/(2)+ cx+k`
where k= intergration constant.
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