$\lim_{x\to\infty}\left(\frac{x^{\:3}}{e^x}\right)$

$4x^2-20x-24y=-97$

$\frac{d}{dx}\left(\frac{x-3}{x+2}\right)^2$

$4685.5124\cdot2$

$\lim_{x\to3}\left(\frac{x^2+9}{x-3}\right)$

$sin\left(63\pi\:t\right)cos\left(126\pi\:t\right)\:$

$\frac{\left(x^3-5x^2-5x-3\right)}{x+3}$