$$\left(\frac{4a}{a^2b^{-3}}^{-1}b\right)^2$$

$$sin\left(x\right)csc\left(x\right)^2$$

$$\left(y-8z\right)\left(y^2+8yz+64z^2\right)$$

$$\frac{dy}{dx}=\:\left(\frac{x+y}{2x}\right)$$

$$14x^4y^3z^2\:and\:49x^2y^2z^2$$

$$2-2n=3n+17$$