$$\lim_{x\to\infty}\left(\left(1+\left(\frac{4}{x}\right)^{5x}\right)\right)$$

$$\int\left(sen\:\theta+cos\:\theta\right)^2\:dx$$

$$\int\:\left(3\left(x^3+2\right)^7\:x^2\right)dx$$

$$\left(6-x\right)\left(5-x\right)\left(7-x\right)$$

$$\frac{x^4-5x^2+4}{x+5}$$

$$\lim_{x\to3}\left(\frac{x-3}{x+3}\right)$$

$$\left(2x+8\right)\left(2x-8\right)$$