For each of the following integrals, determine whether integration by substitution or integration by parts is more appropriate. Do not evaluate the integrals.

(a)$\displaystyle \int x^2cos(x^3) dx$

(b)$\displaystyle \int \frac{1}{sqrt(3x+1)} dx$

(c)$\displaystyle \int x^2sin(x) dx$

(d)$\displaystyle \int ln(x) dx$

(e)$\displaystyle \int xsin(x) dx$

(f)$\displaystyle \int \frac{x^2}{1+x^3}dx$

(g)$\displaystyle \int xe^(x^2) dx$

Which of the integrals are more appropriately found using integration by substitution?

Which of the integrals are more appropriately found using integration by parts?

I have b,d, and f, for sub and a,c,e, and g for by parts.