$\frac{dy}{dx}=-ax+bu\left(d\right)$

$\int_2^32xdx$

$10m^2n^4-16m^8$

$\lim_{x\to0}\left(\frac{e^{-2x}-sin\left(2x\right)-1}{x\cdot sin\left(5x\right)+8x^2}\right)$

$9x^2-24x-16$

$\frac{a^6-27m^3}{a^2-3m}$

$\frac{1}{1+\cos\left(x\right)}+\frac{1}{1-cos\left(x\right)}=\sin^2\left(x\right)$