$$\frac{d}{dx}y=x^3e^{-5x}$$

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

$$5x^2+30x-1$$

$$\lim_{x\to-2}\cos\left(\frac{1}{x+2}\right)$$

$$\left(2c-4\right)\left(2c+4\right)-\left(4c-2\right)^2$$

$$12w^{14}z^2-16w^{10}z^4-18w^3z^3$$

$$x^{-\frac{1}{4}}=4$$