I.3.1.53 Indefinite Integrals

Condition: find vague integrals: 1) \ (\ int \ frac {d x} {\ sin ^{2} (1-2 x) \) 2) \ (\ int \ sin {x} {2} \ cos {2} d x \) 3) \ (( \ int \ frac {x d x} {\ sqrt {x^{4} +5}} \) 3) \ (\ int \ frac {d x} {\ arcos^{5} x \ sqrt {1-x {2}}} \).