$$\lim_{x\to-1}\left(\frac{5x^2+7x+2}{x+1}\right)$$

$$66\cdot517$$

$$\int\left(x^2\sqrt{x^3+14}\right)dx$$

$$4x-7<5$$

$$\frac{8}{3}c+\frac{4}{3}d-\frac{13}{3}c+\frac{6}{3}a^3$$

$$\frac{dy}{dx}=\frac{\left(y^2\right)}{x-1}$$

$$\frac{3x^2+7x\:-20}{3x+5}$$