$$\frac{d}{dx}t^{t^t}$$

$$3x^2-6x\le0$$

$$cos^2x-sin^2x=1$$

$$\left(\cot^4\left(t\right)-\csc^4\left(t\right)\right)$$

$$\left(a^2-49\right)\cdot\left(6\right)\cdot\left(\left(a+1\right)^2+\left(a-1\right)^2\right)$$

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

$$4^{x\:}=\:2^x$$