$$\frac{9^{7}+6^{7}}{9+6}$$

$$\lim_{x\to\infty}\left(\frac{\sin\left(\frac{8}{x}\right)}{\arctan\left(\frac{1}{x}\right)}\right)$$

$$x^5y^5=x^5y^5$$

$$\int-14\left(3x+2\right)cos\left(4x\right)dx$$

$$\frac{2x^3-2}{2x+2}$$

$$5sen\left(\frac{x}{3}\right)\left(cos\left(\frac{x}{2}\right)\right)$$