$$9x^2\:+\:y^2\:=\:6$$

$$32^24b$$

$$\left(6c-9b\right)^3$$

$$\left(a^7-a^3\right)^4$$

$$\frac{\tan x+2}{\sec x}=2\cos x+sin\:x$$

$$\frac{cot\left(x\right)}{1+cot^2\left(x\right)}$$

$$\frac{d^3}{dx^3}\left(x^8\cdot\cos\left(e^y\right)\right)$$