$i^2$
$\frac{xy'}{x}+\frac{4y}{x}=\frac{2x^3}{x}$
$\left(\left(2x-1\right)^2-2x^2>2x^2+5\right)$
$4\cdot\left(10-2\cdot3\right)-9$
$\int_{1000}^{1500}\left(x+100\right)dx$
$3x-\frac{1}{2}>6$
$\lim_{x\to n}\left(\:\left(\frac{a}{n-1}\right)\right)$
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