$\frac{2x^2+8x-3}{6x^2-7x+2}$

$3z^7-7z^3+21z^2$

$\lim_{x\to\infty}\frac{5x^3-6x}{7x^{33}}$

$322\cdot322-2\cdot322\cdot22+22\cdot22$

$\left(3\right)\left(-5\right)\left(-2\right)\left(4\right)$

$\frac{d}{dx}\left(\:x^{2\:cos\:x}\right)$

$\lim_{x\to0}\left(\frac{a}{\left(-1+e^{\frac{b}{xt}}\right)\cdot x^5}\right)$