$\frac{8^{2m}}{8^{m^2}}$

$\left(6h^2+\frac{1}{4}k\right)^3$

$\frac{x}{x^2y^4y^{-4}}$

$\int\frac{4x^2-8x-4}{\left(x^2-1\right)\left(x+1\right)^2}dx$

$\left(1+\csc\left(a\right)\right)\left(1-\csc\left(a\right)\right)=-\cot\left(a\right)$

$628cm^2+1256cm^2$

$12b\:-\:36\:+\:5b\:-\:4b$