Solve it in wavy curve method.:

$$\begin{gathered} \left(\mathrm{ii}\right) \frac{{\mathrm{x}}^2-5\mathrm{x}+4}{{\left(3-\mathrm{x}\right)}^3{\left(\mathrm{x}+2\right)}^4}<0 \\ \left(\mathrm{iv}\right) \frac{{\left({\mathrm{x}}^2+\mathrm{x}\right)}^2}{{\left(\mathrm{x}-2\right)}^4{\left(\mathrm{x}-1\right)}^5}\ge 0 \end{gathered}$$