$$\sin\left(a\right)\cot\left(a\right)\cos$$

$$0.3+0.2+0.13+0.25+0.11$$

$$\int\:\:x^8\left(\sqrt{x+2}\right)dx$$

$$\lim_{x\to0}\left(\frac{\cos^2\left(x-1\right)}{sen^2\left(x\right)}\right)$$

$$\frac{1}{\cot}+\frac{\cos}{\sin}$$

$$\left(y+7\right)\left(y-7\right)$$

$$\left(a-7\right)^4$$