$$x\left(x-20\right)$$

$$\left(x^8-y^8\right)^3$$

$$-6x-22-24-1x$$

$$\left(x^{10}+11\right)\left(x^{10}+4\right)$$

$$100-+8+-72-52+110$$

$$\frac{d}{dx}\left(x^2\cdot y-y^3+8x=7x+5ay\right)$$

$$\frac{5^{10}}{5^{12}}$$