$$\left(4ab^5-a^2\right)^2$$

$$\left(4x+8y^2\right)\left(4x-8y^2\right)$$

$$x^2-24-11x$$

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

$$\frac{6x^4-2x^2+5x-3}{x-2}$$

$$\left(3-5m\right)^3$$

$$\frac{d^2}{dx^2}\left(x^2y+3y-4\right)$$