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Integrals

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Trig Substitution

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1. 4+x2dx 2. 1+4x2dx 3. 1+x2dx 4. 25+x2dx 5. x2+9dx 6. x2+4dx 7. x2+2dx 8. 49+x2dx 9. 9+4x2dx 10. 1+16x2dx