I.3.1.35 Indefinite Integrals

Condition: find vague integrals: a) \ (\ int \ frac {7 x+2} {\ sqrt {-x^{2} -3 x-1}} d x \) \ (\ int \ frac {\ cos 2 x} {\ cos 4 x-3 \ sin 2 x} D x \), c) \ (\ int \ sqrt {x+1} \ ln x d x \)