I.3.1.17 Indefinite Integrals

Condition: Find vague integrals. Check the results with differentiation. a) \ (\ int \ frac {3 x-7} {x^{3} +4 x^{2} +4 x+16} d x \) b) \ (\ int \ frac {d x} {\ sqrt {x+3}+\ sqrt [3] {(x+3)^{2}} \)