$$\lim_{x\to\infty}\left(\frac{3x^3-4x^2-3x+7}{6x^2-x-8}\right)$$

$$4,3-2,84$$

$$3x^2-2x-3$$

$$\int cos\left(3x\right)e^{3-x}dx$$

$$d\left(y=x-3\right)$$

$$\int_2^0\left(\frac{1}{x^2}\right)dx$$

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