$\frac{a^{2}-6a+4}{2a}$

$1^{-6}$

$\int_1^4\left(e^{2x}\left(4+e^{2x}\right)^4\right)dx$

$\frac{1}{x-2}+\frac{1}{x-3}=1$

$\left(3ab^5c^3\right)^2$

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

$\frac{sec^2\left(x\right)-tan^2\left(x\right)+tan\left(x\right)}{sec\left(x\right)}$