$$\frac{-228}{-12}$$

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

$$\frac{\left(1-\cos\left(x\right)\right)\left(1+\cos\left(x\right)\right)}{\sin\left(x\right)}=\sin\left(x\right)$$

$$\frac{x+2}{x+1}<3$$

$$8\cdot1183$$

$$\log\left(x+5\right)-\log\left(2x+1\right)=\log\left(\frac{3}{x-1}\right)$$

$$\int e^{\frac{x}{2}}cos5xdx$$