$4x^2+6x\ge4$
$\frac{x^2+4x-6}{x+1}$
$5\cdot5+5-2-3+5$
$\lim_{n\to\infty}\left(\frac{78n^2-9n+9}{2n^2}\right)$
$\:\left(-5f+6\right)-\left(9f+4\right)$
$\int e ^ { 10 x + 3 } d x$
$\frac{dy}{dx}=3x+2$
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