$\lim_{x\to\infty}\left(\frac{e^n}{n^2}\right)$
$3x-4<7x-12$
$\frac{-6x+4}{2}$
$3x-5\cdot3x+5$
$2\cdot x-3,x=7$
$-2\cdot\left|-\left(3+5\right)-2\cdot\left(4-1+3\right)\right|$
$x^2y+x^3y+x^2y+x^3y$
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