$x^2-49+45$
$3x^2-24x+45$
$2x\:-\:1\:>\:4$
$\frac{dy}{dx}+4y=3x$
$20\:-14\:+8\:+5\:$
$12x^2>\:27x+27$
$\int\left(\cos\left(2x+1\right)\right)dx$
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