$\frac{1}{2}f=3\frac{f}{2}$

$\frac{dy}{dx}=\frac{4x^3}{3e^y}$

$\left(5^3\right)^{21}$

$\left(x^3-2x+3\right)\left(x^2+4x-1\right)$

$\left(4a-2\right)\left(4a+2\right)$

$\frac{x^2\cdot2x-3}{x-2}$

$\sec\left(x\right)+\csc\left(x\right)=\frac{1-\tan\left(x\right)}{\sin\left(x\right)}$