$$x^4+5x^2+9$$

$$\frac{dy}{dx}\frac{\left(y+1\right)^2}{x}=y\ln\left(x\right)$$

$$5\cdot\left(y+2\right)^2$$

$$3x^2+12x-3=0$$

$$m^4-22m^2+40$$

$$\frac{dy}{dx}+\frac{5y}{x-2}=\frac{6\sin\left(x\right)}{\left(x-2\right)^5}$$

$$\lim_{x\to\frac{\pi}{2}}\left(\frac{3\cos^2\left(x\right)}{2-2\sin\left(x\right)}\right)$$