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Evaluate: int(cos2x+x+1)/(x^2+sin2x+2x)d...

Evaluate: `int(cos2x+x+1)/(x^2+sin2x+2x)dx`

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To evaluate the integral \[ I = \int \frac{\cos 2x + x + 1}{x^2 + \sin 2x + 2x} \, dx, \] we will use the method of substitution. ...
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