Solution of IDZ Ryabushko 8.4 - Variant 4

Section: Chapter 8. Indefinite Integral
Topic: Indefinite Integral: Complex Substitutions and Special Techniques
Description: Computing indefinite integrals of rational, trigonometric, and irrational functions using the universal trigonometric substitution, substitutions for irrationalities, the method of undetermined coefficients, as well as combined methods. Includes integrals that are not reducible to tabular ones by standard techniques.

Tasks:
1. Find indefinite integrals (1–9)

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• Complete solution of all 9 tasks of the variant
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