$$x-8\pi=\pi$$

$$\sqrt{\left(x+1\right)^2}$$

$$\frac{dy}{dx}=\frac{xy^2e^x+xye^x-y^2-y}{xy+2x}$$

$$\left(w^3-5x^2\right)\left(w^6+5w^3x^2+25x^4\right)$$

$$\sqrt{\frac{r}{r^2+4}}$$

$$y=\:sen^2\left(7x^2-9x+2\right)$$

$$6\left(\sin\left(5x^2-\pi\right)\right)$$