$$tan^2xcscx^2xcosx$$

$$\left(2x+3x^2\right)^3$$

$$\frac{\left(cos\left(2x\right)\cdot\cos\left(x\right)\right)}{\sin\left(x\right)}$$

$$\frac{cot\:b}{cos\:b}=\frac{1}{\sin b}$$

$$3\log\left(\frac{z}{y}\right)-\log\left(y^{-1}\right)-\log\left(z^3y\right)$$

$$\frac{d}{dx}\left(y=\left(9x^2-2\right)^{sec\left(x\right)}\right)$$

$$\left(27\right)\left(-3\right)\left(-15\right)$$