I'm trying to find the indefinite integrals for the two equations below. What methods do I use to solve?

Attachment 27559

Attachment 27560 (-1 < x < 1)

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- Mar 16th 2013, 10:17 AMjennybeeWhich methods to use to find the integrals.
I'm trying to find the indefinite integrals for the two equations below. What methods do I use to solve?

Attachment 27559

Attachment 27560 (-1 < x < 1)

Thanks - Mar 16th 2013, 10:23 AMKanwar245Re: Which methods to use to find the integrals.
The first one can be solved by integration by parts, let $\displaystyle u = arctan x, dv = 2x^3 + x$

Second one can be done easily by a substitution of $\displaystyle u = 1 - x^2$ - Mar 16th 2013, 10:23 AMTheEmptySetRe: Which methods to use to find the integrals.
- Mar 16th 2013, 10:26 AMjennybeeRe: Which methods to use to find the integrals.
Thanks to both of you. Loving the Sephiroth avatar :)