$14\:-\:\left(-7\right)\:$
$4x+8x-3x$
$10-3+5+2-9+1$
$\left(y-1\right)dx+x^2dy=0$
$a-b-a+b$
$\frac{d}{dx}\left(x^{\sinh x}\right)$
$\int\frac{x^2}{\left(x^2+16\right)^2}dx$
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