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**Integration Help - u Substiution. [urgent]**

## Homework Statement

Evaluate the following integrals.

(Here are the functions with respect to x)

1. x^2/(x+1)^5

2. (4x^2+4x+1)^10

3. x^2[sqr(1-x)]

4. (x+1)(x-3)^10

5. sqr(x)[sqr(4+xsqr(x))]

Looking more for how to solve them, not what the answer is..

Im good when its in the simple form, its just when its not multiplied by the derivative of the inside I get stuck.

## Homework Equations

## The Attempt at a Solution

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