(x^3) (x^2 +1)^(1/2)
can anyone tell me what i should substitute here?
And another...
... where
... is the product rule (straight lines differentiating downwards), so that...
is integration by parts, but (I hope) a lazy version where choosing legs crossed or un-crossed does for assigning u du and v dv.
Spoiler:
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Don't integrate - balloontegrate!
Balloon Calculus; standard integrals, derivatives and methods
Balloon Calculus Drawing with LaTeX and Asymptote!