$-5x^2+40x-65=0$
$c^2-c\:+30$
$\frac{dy}{dx}=-4y=x^5e^x$
$\int2\cos6xdx$
$\:18x+24$
$\frac{20x^4-8x^2+6x-4}{x-2}$
$+48+68+36$
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