$\frac{x^3+2x+1}{x^2-x+3}$
$4x+6\ge30$
$x^2-10x+29$
$\frac{7}{3}a^5\:\:-\frac{1}{4}8a^2$
$\lim_{x\to\infty}\left(\frac{x}{3+\frac{3}{x}}\right)$
$\left(a^{2n+1}\right)\left(a^{2n}-3\right)$
$\int\frac{2x^2+4x-9}{\left(x-1\right)\left(x+3\right)\left(x-4\right)}dx$
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