$$\int \frac{x \mathrm{~d} x}{(x-1)^2(x+2)}=$$

Let $Z$ be a complex number such that $|Z|+Z=2+i$ (where $i=\sqrt{-1})$, then $|Z|$ is equal to

_________ numbers greater than a million can be formed with the digits 2, 3, 0, 3, 4, 2, 3.

For the following shaded region, the linear constraints are