$$\left(3x\:+7\right)\left(x-5\right)^2$$

$$a^4b^2-6abc+9^2$$

$$\sqrt{b^n}\cdot\sqrt[4]{b^n}$$

$$\int\frac{\left(2x-7\right)}{x^2+9}dx$$

$$\left(2x-7y\right)\left(4x^2+14xy+49y^2\right)$$

$$5x^25$$

$$f\left(x\right)=-x^2-8x-20$$