$$\lim_{x\to\pi}\left(\frac{sin\pi x}{sin5\pi x}\right)$$

$$\frac{1-x-x^2}{1-x^3}$$

$$-340+280-450-340-650+1200+1400+2300$$

$$-x+y+xy'=0$$

$$-9\left(4-6x\right)$$

$$\sqrt[2]{1.7}$$

$$\lim_{x\to5}\left(\frac{x+1}{x-5}\right)$$