The integral $ \int_0^1 \frac{1}{2 + \sqrt{2e}} \, dx $ is:
\( \int \left( \frac{1}{7} - 6x - x^2 \right) \, dx \)
\(\int \frac{1}{\cos^3 x \sqrt{\sin 2x}} \, dx\)
\( -\tan\left(\frac{1}{x}\right) + \frac{1}{x} + c = ? \)
\(\int \frac{1}{(x + 2)(1 + x)^2} \, dx\)
\( \int \frac{(x^2 - 1)}{x^3 \sqrt{2x^4 - 2x^2 + 1}} \, dx = ? \)
\( \int e^x (1 - \cot(x) + \cot^2(x)) \, dx = ? \)
\( \int \frac{dx}{\sin(x) + \cos(x)} = ? \)