$$\left(4+x\right)^{-\frac{1}{2}}$$

$$y=\ln\left(\frac{\left(x+11\right)}{\sqrt{\left(x^3-4\right)}}\right)$$

$$\lim_{x\to\infty}\left(\cos\frac{1}{x}\right)^2$$

$$\left(x-8\right)\left(x+9\right)$$

$$5e^{2-3}$$

$$\lim_{x\to0}\left(\frac{6t^5}{e^t}\right)$$

$$-6-\left(-6\right)+7\left(-4\right)+\left(-1\right)$$