$\left(100+2x\right)y'+y=7\left(100+2x\right)$
$\int\frac{x^2}{4x^3-4}dx$
$\left(x+2\right)\left(x-5\right)<\:0$
$-7x-8\ge-9+9x$
$x+\frac{x}{x-3}=\frac{7x-18}{x-3}$
$\int\sqrt{10}\sqrt{x}dx$
$\frac{1}{3}xy+\frac{2}{5}xy+\frac{1}{8}xy$
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