$x^2+1\frac{1}{x^2}$
$\frac{d}{dx}730+1x=\frac{340}{340+y}\cdot\:680$
$3x^2+15x=3x$
$3x-8x-4x$
$\int\:\frac{x^2+1}{x+6}dx$
$289v^2-49z^2$
$4x^2+16x-84=0$
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