$\int\frac{x+5}{x^2-x-2}dx$
$2x^7+3x^6-5x^5$
$r-76=54$
$cos^2x+2cosx-3=0$
$x^2-6x+14$
$x^2+14x+49=0$
$\left(-2\:a^3b^4\right)^3$
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