$\lim_{x\to3}\:x^3+2x+5$

$\int_e^{\infty}x^3lnxdx$

$\:\frac{d}{dx}\left(\frac{\left(x+3\right)^6\left(x-1\right)^3}{\left(x+2\right)^3}\right)$

$28x^2y^2-63x^4y$

$\left(\frac{2}{3}a\right)^3-\left(\frac{5}{\text{4}}b\right)^3$

$5+\left|-2\right|$

$\lim_{x\to\infty}\left(\frac{x^2+5x+2}{3x+6}\right)$