$\frac{dx}{dt}=ke^{-t}$

$25.6036+49.4508+56.1816+16.9744+4.4944+0.0324+7.0688+26.3452+34.5744+62.0944$

$\int\frac{y}{\left(y-3\right)\left(2y+1\right)}dy$

$4x^2-x+2>0$

$\lim_{x\to\pi}\left(\frac{\cos\left(x-\frac{\pi}{2}\right)}{cos\left(x+\frac{\pi}{2}\right)}\right)$

$\left(2a-b\right)\left(x+3\right)$

$1\cdot2\cdot2$