$$x^{m^2+m-3}-2x^{\frac{n}{5}}y^{m+1}+3y^{\frac{n}{5}+4}$$

$$\left(y+sen\:y\right)y'=x+x^3$$

$$\frac{dy}{dx}=\frac{18y^3}{\left(1-3x\right)^2}$$

$$64x^2+48xy\:+9y^2$$

$$\lim_{x\to0}\left(\frac{x^2-3x}{2x^2+x}\right)$$

$$\lim_{x\to\infty}\left(\frac{\sqrt{4x^2+1\:}}{x^2}\right)$$

$$\left(6a-8m\right)^2$$