$y'\:+\:2y\:=\:y^2\:+\:1$
$\left(8n^2+3n^7\right)\left(8n^2+3n^7\right)$
$-65+-90+-15+-56$
$\frac{2x^2+x-2}{x+2}$
$\int_{-1}^2\left(\frac{3+x}{x-4}\right)dx$
$\left(a^2+5\right)\left(a^3-2\right)$
$-4\sin^2x=-1$
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