$$36a^2-30ab+2b^2$$

$$2x^2+8x-5^2$$

$$\left(2x-1\right)\left(x^2-5\right)\left(x^3-2\right)$$

$$\int\sqrt{-4x^2-20x-9}dx$$

$$4v-24$$

$$\lim_{x\to2}\left(\frac{x^2+2x-8}{x^2-x-2}\right)$$

$$f\left(x\right)=\frac{x+2}{x^2}$$