$y'+y=-2$
$x^2+\frac{1}{3}x=3$
$\frac{a^9}{a^3}$
$\:\frac{4\left(-5\right)+4}{12-3-1}$
$2x\left(x+2\right)\left(2x^3+x^2\right)$
$\lim_{x\to\infty}\left(\frac{5x+1}{5x+\sqrt[3]{x}}\right)$
$2x^3du-2u^3x^2dx$
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