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

$\lim_{x\to\infty}\left(\frac{4+9x^9}{x^6+6x^9}\right)$

$36x^2+120xy+100y^2$

$3a\:+\:4b-c,\:a=1,\:b=-3,\:c=2$

$5\left(x-3\right)\ge2x+3\left(x-5\right)$

$1+2+3+4+5+15$

$9-\left(12-6+2\right)+4+\left(-8+1\right)$