$$\lim_{x\to0}\left(\frac{2x^2-x^3}{x^5-2x^2}\right)$$

$$9x^2-30x+10$$

$$\frac{-x^4-4x^3+5x^2-7}{x-2}$$

$$\left(25\right)\left(8\:-15\right)$$

$$\int\frac{5}{\left(3x+6\right)^4}dx$$

$$2\log\left(a^2b\right)=3+\log\left(a\right)-\log\left(b\right)$$

$$\left(3x-5\right)\left(3x-4\right)$$