$$\frac{x^3-64}{x+5}$$

$$\lim_{x\to infinito\:}\left(\frac{-1}{xln^2x}\right)$$

$$\frac{x^2-4}{11-2x}$$

$$\left(3ag^2+a\right)^3$$

$$\int\left(x-4\right)sen\left(4-x\right)dx$$

$$\int\frac{\left(9-x\right)^2}{2}dx$$