$2y'=2x-y+3$
$\lim_{x\to-\infty}\left(\frac{x^3+x^2-6x}{x^3-3x^2+4}\right)$
$\sin\left(a\right)^2\left(1+\cot\left(a\right)^2\right)$
$\left(-4x^3+6\right)\left(4x^3+6\right)$
$\frac{6x}{5}\le2-\frac{x}{10}$
$\sec\left(x\right)\sec^2\left(x\right)$
$3\left(x+5\right)\ge x-3$
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